diff --git a/src/TestFramework/TestFramework/Assertions/Assert.Count.cs b/src/TestFramework/TestFramework/Assertions/Assert.Count.cs
index c106e77bc5..470f8d6383 100644
--- a/src/TestFramework/TestFramework/Assertions/Assert.Count.cs
+++ b/src/TestFramework/TestFramework/Assertions/Assert.Count.cs
@@ -47,8 +47,7 @@ internal void ComputeAssertion(string assertionName, string collectionExpression
         {
             if (_builder is not null)
             {
-                _builder.Insert(0, string.Format(CultureInfo.CurrentCulture, FrameworkMessages.CallerArgumentExpressionSingleParameterMessage, "collection", collectionExpression) + " ");
-                ReportAssertCountFailed(assertionName, _expectedCount, _actualCount, _builder.ToString());
+                ReportAssertCountFailed(assertionName, _expectedCount, _actualCount, _builder.ToString(), collectionExpression);
             }
         }
 
@@ -115,8 +114,7 @@ internal void ComputeAssertion(string collectionExpression)
         {
             if (_builder is not null)
             {
-                _builder.Insert(0, string.Format(CultureInfo.CurrentCulture, FrameworkMessages.CallerArgumentExpressionSingleParameterMessage, "collection", collectionExpression) + " ");
-                ReportAssertIsNotEmptyFailed(_builder.ToString());
+                ReportAssertIsNotEmptyFailed(_builder.ToString(), collectionExpression);
             }
         }
 
@@ -207,8 +205,7 @@ public static void IsNotEmpty<T>(IEnumerable<T> collection, string? message = ""
             return;
         }
 
-        string userMessage = BuildUserMessageForCollectionExpression(message, collectionExpression);
-        ReportAssertIsNotEmptyFailed(userMessage);
+        ReportAssertIsNotEmptyFailed(message, collectionExpression);
     }
 
     /// <summary>
@@ -229,8 +226,7 @@ public static void IsNotEmpty(IEnumerable collection, string? message = "", [Cal
             return;
         }
 
-        string userMessage = BuildUserMessageForCollectionExpression(message, collectionExpression);
-        ReportAssertIsNotEmptyFailed(userMessage);
+        ReportAssertIsNotEmptyFailed(message, collectionExpression);
     }
     #endregion // IsNotEmpty
 
@@ -252,7 +248,7 @@ public static void HasCount<T>(int expected, IEnumerable<T> collection, [Interpo
 #pragma warning restore IDE0060 // Remove unused parameter
     {
         TelemetryCollector.TrackAssertionCall("Assert.HasCount");
-        message.ComputeAssertion("HasCount", collectionExpression);
+        message.ComputeAssertion(nameof(HasCount), collectionExpression);
     }
 
     /// <summary>
@@ -267,7 +263,7 @@ public static void HasCount<T>(int expected, IEnumerable<T> collection, [Interpo
     /// Users shouldn't pass a value for this parameter.
     /// </param>
     public static void HasCount<T>(int expected, IEnumerable<T> collection, string? message = "", [CallerArgumentExpression(nameof(collection))] string collectionExpression = "")
-        => HasCount("HasCount", expected, collection, message, collectionExpression);
+        => HasCount(nameof(HasCount), expected, collection, message, collectionExpression);
 
     /// <summary>
     /// Tests whether the collection has the expected count/length.
@@ -280,7 +276,7 @@ public static void HasCount<T>(int expected, IEnumerable<T> collection, string?
     /// Users shouldn't pass a value for this parameter.
     /// </param>
     public static void HasCount(int expected, IEnumerable collection, string? message = "", [CallerArgumentExpression(nameof(collection))] string collectionExpression = "")
-        => HasCount("HasCount", expected, collection, message, collectionExpression);
+        => HasCount(nameof(HasCount), expected, collection, message, collectionExpression);
 
     #endregion // HasCount
 
@@ -301,7 +297,7 @@ public static void IsEmpty<T>(IEnumerable<T> collection, [InterpolatedStringHand
 #pragma warning restore IDE0060 // Remove unused parameter
     {
         TelemetryCollector.TrackAssertionCall("Assert.IsEmpty");
-        message.ComputeAssertion("IsEmpty", collectionExpression);
+        message.ComputeAssertion(nameof(IsEmpty), collectionExpression);
     }
 
     /// <summary>
@@ -315,7 +311,7 @@ public static void IsEmpty<T>(IEnumerable<T> collection, [InterpolatedStringHand
     /// Users shouldn't pass a value for this parameter.
     /// </param>
     public static void IsEmpty<T>(IEnumerable<T> collection, string? message = "", [CallerArgumentExpression(nameof(collection))] string collectionExpression = "")
-        => HasCount("IsEmpty", 0, collection, message, collectionExpression);
+        => HasCount(nameof(IsEmpty), 0, collection, message, collectionExpression);
 
     /// <summary>
     /// Tests that the collection is empty.
@@ -327,7 +323,7 @@ public static void IsEmpty<T>(IEnumerable<T> collection, string? message = "", [
     /// Users shouldn't pass a value for this parameter.
     /// </param>
     public static void IsEmpty(IEnumerable collection, string? message = "", [CallerArgumentExpression(nameof(collection))] string collectionExpression = "")
-        => HasCount("IsEmpty", 0, collection, message, collectionExpression);
+        => HasCount(nameof(IsEmpty), 0, collection, message, collectionExpression);
 
     #endregion // IsEmpty
 
@@ -343,8 +339,7 @@ private static void HasCount<T>(string assertionName, int expected, IEnumerable<
             return;
         }
 
-        string userMessage = BuildUserMessageForCollectionExpression(message, collectionExpression);
-        ReportAssertCountFailed(assertionName, expected, actualCount, userMessage);
+        ReportAssertCountFailed(assertionName, expected, actualCount, message, collectionExpression);
     }
 
     private static void HasCount(string assertionName, int expected, IEnumerable collection, string? message, string collectionExpression)
@@ -359,24 +354,44 @@ private static string GetTrackedAssertionName(string assertionName)
         };
 
     [DoesNotReturn]
-    private static void ReportAssertCountFailed(string assertionName, int expectedCount, int actualCount, string userMessage)
+    private static void ReportAssertCountFailed(string assertionName, int expectedCount, int actualCount, string? userMessage, string collectionExpression)
     {
-        string finalMessage = string.Format(
-            CultureInfo.CurrentCulture,
-            FrameworkMessages.HasCountFailMsg,
-            userMessage,
-            expectedCount,
-            actualCount);
-        ReportAssertFailed($"Assert.{assertionName}", finalMessage);
+        bool isEmptyAssertion = string.Equals(assertionName, nameof(IsEmpty), StringComparison.Ordinal);
+        string summary = isEmptyAssertion
+            ? FrameworkMessages.IsEmptyFailedSummary
+            : FrameworkMessages.HasCountFailedSummary;
+
+        string expectedEvidenceText = expectedCount.ToString(CultureInfo.CurrentCulture);
+        string expectedCallSiteText = expectedCount.ToString(CultureInfo.InvariantCulture);
+        string actualText = actualCount.ToString(CultureInfo.CurrentCulture);
+        EvidenceBlock evidence = EvidenceBlock.Create()
+            .AddLine("expected count:", expectedEvidenceText)
+            .AddLine("actual count:", actualText);
+
+        StructuredAssertionMessage structured = new(summary);
+        structured.WithUserMessage(userMessage);
+        structured.WithEvidence(evidence);
+        structured.WithExpectedAndActual(expectedEvidenceText, actualText);
+        structured.WithCallSiteExpression(isEmptyAssertion
+            ? FormatCallSiteExpression($"Assert.{assertionName}", collectionExpression, "<collection>")
+            : FormatCallSiteExpression($"Assert.{assertionName}", expectedCallSiteText, collectionExpression, "<expected>", "<collection>"));
+
+        ReportAssertFailed(structured);
     }
 
     [DoesNotReturn]
-    private static void ReportAssertIsNotEmptyFailed(string userMessage)
+    private static void ReportAssertIsNotEmptyFailed(string? userMessage, string collectionExpression)
     {
-        string finalMessage = string.Format(
-            CultureInfo.CurrentCulture,
-            FrameworkMessages.IsNotEmptyFailMsg,
-            userMessage);
-        ReportAssertFailed("Assert.IsNotEmpty", finalMessage);
+        string actualText = 0.ToString(CultureInfo.CurrentCulture);
+        EvidenceBlock evidence = EvidenceBlock.Create()
+            .AddLine("actual count:", actualText);
+
+        StructuredAssertionMessage structured = new(FrameworkMessages.IsNotEmptyFailedSummary);
+        structured.WithUserMessage(userMessage);
+        structured.WithEvidence(evidence);
+        structured.WithExpectedAndActual("> 0", actualText);
+        structured.WithCallSiteExpression(FormatCallSiteExpression("Assert.IsNotEmpty", collectionExpression, "<collection>"));
+
+        ReportAssertFailed(structured);
     }
 }
diff --git a/src/TestFramework/TestFramework/Assertions/Assert.cs b/src/TestFramework/TestFramework/Assertions/Assert.cs
index 6a46f4a88f..25f5aab3d1 100644
--- a/src/TestFramework/TestFramework/Assertions/Assert.cs
+++ b/src/TestFramework/TestFramework/Assertions/Assert.cs
@@ -244,20 +244,6 @@ private static string FormatAssertionFailed(string assertionName, string? messag
     internal static string BuildUserMessage(string? format)
         => format ?? string.Empty;
 
-    private static string BuildUserMessageForSingleExpression(string? format, string callerArgExpression, string parameterName)
-    {
-        string userMessage = BuildUserMessage(format);
-        if (string.IsNullOrEmpty(callerArgExpression))
-        {
-            return userMessage;
-        }
-
-        string callerArgMessagePart = string.Format(CultureInfo.InvariantCulture, FrameworkMessages.CallerArgumentExpressionSingleParameterMessage, parameterName, callerArgExpression);
-        return string.IsNullOrEmpty(userMessage)
-            ? callerArgMessagePart
-            : $"{callerArgMessagePart} {userMessage}";
-    }
-
     private static string BuildUserMessageForTwoExpressions(string? format, string callerArgExpression1, string parameterName1, string callerArgExpression2, string parameterName2)
     {
         string userMessage = BuildUserMessage(format);
@@ -272,9 +258,6 @@ private static string BuildUserMessageForTwoExpressions(string? format, string c
             : $"{callerArgMessagePart} {userMessage}";
     }
 
-    private static string BuildUserMessageForCollectionExpression(string? format, string collectionExpression)
-        => BuildUserMessageForSingleExpression(format, collectionExpression, "collection");
-
     private static string BuildUserMessageForPatternExpressionAndValueExpression(string? format, string patternExpression, string valueExpression)
         => BuildUserMessageForTwoExpressions(format, patternExpression, "pattern", valueExpression, "value");
 
diff --git a/src/TestFramework/TestFramework/Resources/FrameworkMessages.resx b/src/TestFramework/TestFramework/Resources/FrameworkMessages.resx
index 9d4fdd1f69..4909169fac 100644
--- a/src/TestFramework/TestFramework/Resources/FrameworkMessages.resx
+++ b/src/TestFramework/TestFramework/Resources/FrameworkMessages.resx
@@ -298,9 +298,6 @@ Actual: {2}</value>
   <data name="DynamicDataSourceShouldExistAndBeValid" xml:space="preserve">
     <value>The dynamic data source '{0}' in type '{1}' should exist and be a property, a method, or a field.</value>
   </data>
-  <data name="HasCountFailMsg" xml:space="preserve">
-    <value>Expected collection of size {1}. Actual: {2}. {0}</value>
-  </data>
   <data name="ContainsSingleMatchFailMsg" xml:space="preserve">
     <value>Expected exactly one item to match the predicate but found {1} item(s). {0}</value>
   </data>
@@ -319,9 +316,6 @@ Actual: {2}</value>
   <data name="DoesNotContainPredicateFailMsg" xml:space="preserve">
     <value>Expected no items to match the predicate. {0}</value>
   </data>
-  <data name="IsNotEmptyFailMsg" xml:space="preserve">
-    <value>Expected collection to contain any item but it is empty. {0}</value>
-  </data>
   <data name="InvalidGitHubUrl" xml:space="preserve">
     <value>Invalid GitHub ticket URL</value>
   </data>
@@ -402,6 +396,15 @@ Actual: {2}</value>
   <data name="IsNotNullFailedSummary" xml:space="preserve">
     <value>Expected value to not be null.</value>
   </data>
+  <data name="HasCountFailedSummary" xml:space="preserve">
+    <value>Expected collection to contain a specific number of elements.</value>
+  </data>
+  <data name="IsEmptyFailedSummary" xml:space="preserve">
+    <value>Expected collection to be empty.</value>
+  </data>
+  <data name="IsNotEmptyFailedSummary" xml:space="preserve">
+    <value>Expected collection to not be empty.</value>
+  </data>
   <data name="ContainsSingleFailedSummary" xml:space="preserve">
     <value>Expected collection to contain exactly one element.</value>
   </data>
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.cs.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.cs.xlf
index 2d91e4afc7..f04f647311 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.cs.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.cs.xlf
@@ -312,9 +312,9 @@ Skutečnost: {2}</target>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">Očekávala se kolekce {1} velikosti. Skutečnost: {2} {0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Skutečnost: {2}</target>
         <target state="translated">Neplatná adresa URL lístku GitHubu</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">Očekávala se podmínka false.</target>
@@ -382,9 +387,9 @@ Skutečnost: {2}</target>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">Očekávalo se, že kolekce bude obsahovat libovolnou položku, ale je prázdná. {0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.de.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.de.xlf
index bc6994fd6a..bb350d84a2 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.de.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.de.xlf
@@ -312,9 +312,9 @@ Tatsächlich: {2}</target>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">Es wurde eine Sammlung mit einer Größe {1} erwartet. Tatsächlich: {2}. {0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Tatsächlich: {2}</target>
         <target state="translated">Ungültige GitHub-Ticket-URL.</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">Es wurde erwartet, dass die Bedingung „falsch“ lautet.</target>
@@ -382,9 +387,9 @@ Tatsächlich: {2}</target>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">Es wurde erwartet, dass die Sammlung ein beliebiges Element enthält, aber leer ist. {0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.es.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.es.xlf
index 07655856ec..7fd09f4bfe 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.es.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.es.xlf
@@ -312,9 +312,9 @@ Real: {2}</target>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">Se esperaba una colección de tamaño {1}. Real: {2}. {0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Real: {2}</target>
         <target state="translated">Dirección URL de vale de GitHub no válida</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">Se esperaba que la condición fuera false.</target>
@@ -382,9 +387,9 @@ Real: {2}</target>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">Se esperaba que la colección contenga cualquier elemento, pero está vacía. {0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.fr.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.fr.xlf
index b910b08c9e..619c062af6 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.fr.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.fr.xlf
@@ -312,9 +312,9 @@ Réel : {2}</target>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">Collection de tailles attendue {1}. Réel : {2}. {0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Réel : {2}</target>
         <target state="translated">URL de ticket GitHub non valide</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">La condition attendue doit être false.</target>
@@ -382,9 +387,9 @@ Réel : {2}</target>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">La collection doit contenir n’importe quel élément, mais elle est vide. {0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.it.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.it.xlf
index a4706cea2d..8b51dd6364 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.it.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.it.xlf
@@ -312,9 +312,9 @@ Effettivo: {2}</target>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">Prevista raccolta di dimensioni {1}. Effettivo: {2}. {0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Effettivo: {2}</target>
         <target state="translated">L'URL del ticket GitHub non è valido</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">La condizione prevista deve essere false.</target>
@@ -382,9 +387,9 @@ Effettivo: {2}</target>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">È previsto che la raccolta contenga qualsiasi elemento, ma è vuota. {0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.ja.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.ja.xlf
index 9f8d221559..899da827f5 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.ja.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.ja.xlf
@@ -312,9 +312,9 @@ Actual: {2}</source>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">サイズ {1} のコレクションが必要です。実際: {2}。{0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Actual: {2}</source>
         <target state="translated">GitHub チケット URL が無効です</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">予期される条件は false です。</target>
@@ -382,9 +387,9 @@ Actual: {2}</source>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">コレクションには項目が含まれている必要がありますが、空です。{0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.ko.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.ko.xlf
index 12c6954c61..742dcea241 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.ko.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.ko.xlf
@@ -312,9 +312,9 @@ Actual: {2}</source>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">{1} 크기 컬렉션이 필요합니다. 실제: {2}. {0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Actual: {2}</source>
         <target state="translated">잘못된 GitHub 티켓 URL</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">조건이 false여야 합니다.</target>
@@ -382,9 +387,9 @@ Actual: {2}</source>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">항목을 포함할 컬렉션이 필요한데 비어 있습니다. {0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.pl.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.pl.xlf
index 17ae1b9d3c..9251a56f73 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.pl.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.pl.xlf
@@ -312,9 +312,9 @@ Rzeczywiste: {2}</target>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">Oczekiwano kolekcji rozmiaru {1}. Wartość rzeczywista: {2}. {0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Rzeczywiste: {2}</target>
         <target state="translated">Nieprawidłowy adres URL biletu usługi GitHub</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">Oczekiwano warunku o wartości false.</target>
@@ -382,9 +387,9 @@ Rzeczywiste: {2}</target>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">Oczekiwano, że kolekcja będzie zawierać dowolny element, ale jest pusta. {0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.pt-BR.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.pt-BR.xlf
index 598fb3b128..018ca8d290 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.pt-BR.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.pt-BR.xlf
@@ -312,9 +312,9 @@ Real: {2}</target>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">Coleção esperada de tamanho {1}. Real: {2}. {0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Real: {2}</target>
         <target state="translated">URL de tíquete do GitHub inválida</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">Condição esperada como falsa.</target>
@@ -382,9 +387,9 @@ Real: {2}</target>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">A coleção esperada conter qualquer item, mas ela está vazia. {0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.ru.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.ru.xlf
index a9796fb817..ff45fa5606 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.ru.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.ru.xlf
@@ -312,9 +312,9 @@ Actual: {2}</source>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">Ожидается коллекция размеров {1}. Фактически: {2}. {0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Actual: {2}</source>
         <target state="translated">Недопустимый URL-адрес билета GitHub</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">Ожидается, что условие будет ложным (false).</target>
@@ -382,9 +387,9 @@ Actual: {2}</source>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">Ожидается, что коллекция будет содержать любой элемент, но она пуста. {0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.tr.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.tr.xlf
index 1cf96925c0..22d89b08f0 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.tr.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.tr.xlf
@@ -312,9 +312,9 @@ Gerçekte olan: {2}</target>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">Beklenen boyut {1}. Gerçek: {2}. {0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Gerçekte olan: {2}</target>
         <target state="translated">Geçersiz GitHub anahtar URL'si</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">Koşulun yanlış olması bekleniyordu.</target>
@@ -382,9 +387,9 @@ Gerçekte olan: {2}</target>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">Koleksiyonun herhangi bir öğe içermesi bekleniyordu ancak boş. {0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.zh-Hans.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.zh-Hans.xlf
index 19197e286b..a5e03714de 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.zh-Hans.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.zh-Hans.xlf
@@ -312,9 +312,9 @@ Actual: {2}</source>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">大小 {1} 的预期集合。实际： {2}。{0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Actual: {2}</source>
         <target state="translated">GitHub 票证 URL 无效</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">预期条件为 false。</target>
@@ -382,9 +387,9 @@ Actual: {2}</source>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">集合应包含任何项，但它为空。{0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.zh-Hant.xlf b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.zh-Hant.xlf
index 6876681112..24214c32db 100644
--- a/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.zh-Hant.xlf
+++ b/src/TestFramework/TestFramework/Resources/xlf/FrameworkMessages.zh-Hant.xlf
@@ -312,9 +312,9 @@ Actual: {2}</source>
         <target state="new">Expected string to end with the specified suffix.</target>
         <note />
       </trans-unit>
-      <trans-unit id="HasCountFailMsg">
-        <source>Expected collection of size {1}. Actual: {2}. {0}</source>
-        <target state="translated">預期的大小集合 {1}。實際： {2}。{0}</target>
+      <trans-unit id="HasCountFailedSummary">
+        <source>Expected collection to contain a specific number of elements.</source>
+        <target state="new">Expected collection to contain a specific number of elements.</target>
         <note />
       </trans-unit>
       <trans-unit id="InvalidAccessToTestContextProperty">
@@ -327,6 +327,11 @@ Actual: {2}</source>
         <target state="translated">無效的 GitHub 票證 URL</target>
         <note />
       </trans-unit>
+      <trans-unit id="IsEmptyFailedSummary">
+        <source>Expected collection to be empty.</source>
+        <target state="new">Expected collection to be empty.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="IsFalseFailedSummary">
         <source>Expected condition to be false.</source>
         <target state="translated">預期條件為 False。</target>
@@ -382,9 +387,9 @@ Actual: {2}</source>
         <target state="new">Expected value to be negative.</target>
         <note />
       </trans-unit>
-      <trans-unit id="IsNotEmptyFailMsg">
-        <source>Expected collection to contain any item but it is empty. {0}</source>
-        <target state="translated">預期集合包含任何專案，但卻是空的。{0}</target>
+      <trans-unit id="IsNotEmptyFailedSummary">
+        <source>Expected collection to not be empty.</source>
+        <target state="new">Expected collection to not be empty.</target>
         <note />
       </trans-unit>
       <trans-unit id="IsNotInstanceOfFailMsg">
diff --git a/test/UnitTests/TestFramework.UnitTests/Assertions/AssertTests.Items.cs b/test/UnitTests/TestFramework.UnitTests/Assertions/AssertTests.Items.cs
index b9ccc46a93..d3b717e3b7 100644
--- a/test/UnitTests/TestFramework.UnitTests/Assertions/AssertTests.Items.cs
+++ b/test/UnitTests/TestFramework.UnitTests/Assertions/AssertTests.Items.cs
@@ -1,6 +1,8 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
+using System.Globalization;
+
 using AwesomeAssertions;
 
 namespace Microsoft.VisualStudio.TestPlatform.TestFramework.UnitTests;
@@ -25,7 +27,15 @@ public void Count_WhenCountIsNotSame_ShouldFail()
         var collection = new List<int> { 1 };
         Action action = () => Assert.HasCount(3, collection);
         action.Should().Throw<Exception>()
-            .WithMessage("Assert.HasCount failed. Expected collection of size 3. Actual: 1. 'collection' expression: 'collection'.");
+            .WithMessage(
+                """
+                Assertion failed. Expected collection to contain a specific number of elements.
+
+                expected count: 3
+                actual count:   1
+
+                Assert.HasCount(3, collection)
+                """);
     }
 
     public async Task Count_InterpolatedString_WhenCountIsNotSame_ShouldFail()
@@ -34,10 +44,48 @@ public async Task Count_InterpolatedString_WhenCountIsNotSame_ShouldFail()
         DateTime dateTime = DateTime.Now;
         Func<Task> action = async () => Assert.HasCount(1, Array.Empty<int>(), $"User-provided message. {o}, {o,35}, {await GetHelloStringAsync()}, {new DummyIFormattable()}, {dateTime:tt}, {dateTime,5:tt}");
         (await action.Should().ThrowAsync<Exception>())
-            .WithMessage($"Assert.HasCount failed. Expected collection of size 1. Actual: 0. 'collection' expression: 'Array.Empty<int>()'. User-provided message. DummyClassTrackingToStringCalls,     DummyClassTrackingToStringCalls, Hello, DummyIFormattable.ToString(), {string.Format(null, "{0:tt}", dateTime)}, {string.Format(null, "{0,5:tt}", dateTime)}");
+            .WithMessage(
+                $$"""
+                Assertion failed. Expected collection to contain a specific number of elements.
+                User-provided message. DummyClassTrackingToStringCalls,     DummyClassTrackingToStringCalls, Hello, DummyIFormattable.ToString(), {{string.Format(null, "{0:tt}", dateTime)}}, {{string.Format(null, "{0,5:tt}", dateTime)}}
+
+                expected count: 1
+                actual count:   0
+
+                Assert.HasCount(1, Array.Empty<int>())
+                """);
         o.WasToStringCalled.Should().BeTrue();
     }
 
+    public void Count_WhenCurrentCultureUsesCustomNegativeSign_ShouldUseInvariantCallSiteValue()
+    {
+        CultureInfo originalCulture = CultureInfo.CurrentCulture;
+        var customCulture = (CultureInfo)CultureInfo.InvariantCulture.Clone();
+        customCulture.NumberFormat.NegativeSign = "−";
+
+        try
+        {
+            CultureInfo.CurrentCulture = customCulture;
+            var collection = new List<int>();
+
+            Action action = () => Assert.HasCount(-1, collection);
+            action.Should().Throw<Exception>()
+                .WithMessage(
+                    """
+                    Assertion failed. Expected collection to contain a specific number of elements.
+
+                    expected count: −1
+                    actual count:   0
+
+                    Assert.HasCount(-1, collection)
+                    """);
+        }
+        finally
+        {
+            CultureInfo.CurrentCulture = originalCulture;
+        }
+    }
+
     public void NotAny_WhenEmpty_ShouldPass()
         => Assert.IsEmpty(Array.Empty<int>());
 
@@ -53,7 +101,15 @@ public void NotAny_WhenNotEmpty_ShouldFail()
         var collection = new List<int> { 1 };
         Action action = () => Assert.IsEmpty(collection);
         action.Should().Throw<Exception>()
-            .WithMessage("Assert.IsEmpty failed. Expected collection of size 0. Actual: 1. 'collection' expression: 'collection'.");
+            .WithMessage(
+                """
+                Assertion failed. Expected collection to be empty.
+
+                expected count: 0
+                actual count:   1
+
+                Assert.IsEmpty(collection)
+                """);
     }
 
     public async Task NotAny_InterpolatedString_WhenNotEmpty_ShouldFail()
@@ -63,7 +119,16 @@ public async Task NotAny_InterpolatedString_WhenNotEmpty_ShouldFail()
         DateTime dateTime = DateTime.Now;
         Func<Task> action = async () => Assert.IsEmpty(collection, $"User-provided message. {o}, {o,35}, {await GetHelloStringAsync()}, {new DummyIFormattable()}, {dateTime:tt}, {dateTime,5:tt}");
         (await action.Should().ThrowAsync<Exception>())
-            .WithMessage($"Assert.IsEmpty failed. Expected collection of size 0. Actual: 1. 'collection' expression: 'collection'. User-provided message. DummyClassTrackingToStringCalls,     DummyClassTrackingToStringCalls, Hello, DummyIFormattable.ToString(), {string.Format(null, "{0:tt}", dateTime)}, {string.Format(null, "{0,5:tt}", dateTime)}");
+            .WithMessage(
+                $$"""
+                Assertion failed. Expected collection to be empty.
+                User-provided message. DummyClassTrackingToStringCalls,     DummyClassTrackingToStringCalls, Hello, DummyIFormattable.ToString(), {{string.Format(null, "{0:tt}", dateTime)}}, {{string.Format(null, "{0,5:tt}", dateTime)}}
+
+                expected count: 0
+                actual count:   1
+
+                Assert.IsEmpty(collection)
+                """);
         o.WasToStringCalled.Should().BeTrue();
     }
 
@@ -194,7 +259,14 @@ public void Any_WhenNoItem_ShouldFail()
     {
         Action action = () => Assert.IsNotEmpty(Array.Empty<int>());
         action.Should().Throw<Exception>()
-            .WithMessage("Assert.IsNotEmpty failed. Expected collection to contain any item but it is empty. 'collection' expression: 'Array.Empty<int>()'.");
+            .WithMessage(
+                """
+                Assertion failed. Expected collection to not be empty.
+
+                actual count: 0
+
+                Assert.IsNotEmpty(Array.Empty<int>())
+                """);
     }
 
     public async Task Any_InterpolatedString_WhenNoItem_ShouldFail()
@@ -203,7 +275,15 @@ public async Task Any_InterpolatedString_WhenNoItem_ShouldFail()
         DateTime dateTime = DateTime.Now;
         Func<Task> action = async () => Assert.IsNotEmpty(Array.Empty<string>(), $"User-provided message. {o}, {o,35}, {await GetHelloStringAsync()}, {new DummyIFormattable()}, {dateTime:tt}, {dateTime,5:tt}");
         (await action.Should().ThrowAsync<Exception>())
-            .WithMessage($"Assert.IsNotEmpty failed. Expected collection to contain any item but it is empty. 'collection' expression: 'Array.Empty<string>()'. User-provided message. DummyClassTrackingToStringCalls,     DummyClassTrackingToStringCalls, Hello, DummyIFormattable.ToString(), {string.Format(null, "{0:tt}", dateTime)}, {string.Format(null, "{0,5:tt}", dateTime)}");
+            .WithMessage(
+                $$"""
+                Assertion failed. Expected collection to not be empty.
+                User-provided message. DummyClassTrackingToStringCalls,     DummyClassTrackingToStringCalls, Hello, DummyIFormattable.ToString(), {{string.Format(null, "{0:tt}", dateTime)}}, {{string.Format(null, "{0,5:tt}", dateTime)}}
+
+                actual count: 0
+
+                Assert.IsNotEmpty(Array.Empty<string>())
+                """);
         o.WasToStringCalled.Should().BeTrue();
     }
 }