diff --git a/core/engine/src/builtins/array/tests.rs b/core/engine/src/builtins/array/tests.rs
index 7f8d2d98f72..ee594fbb1e6 100644
--- a/core/engine/src/builtins/array/tests.rs
+++ b/core/engine/src/builtins/array/tests.rs
@@ -962,3 +962,26 @@ fn array_of_neg_zero() {
         TestAction::assert("arr.every(x => (1/x) === -Infinity)"),
     ]);
 }
+
+#[test]
+fn array_prototype_find_edge_cases() {
+    run_test_actions([
+        TestAction::run_harness(),
+        TestAction::assert("[].find(x => x === 1) === undefined"),
+        TestAction::assert("[1, 2, 3].find(x => x === 99) === undefined"),
+        TestAction::assert("[1, 2, 1].find(x => x === 1) === 1"),
+        TestAction::assert(indoc! {r#"
+            var obj = { name: "Alice" };
+            [obj].find(x => x.name === "Alice") === obj
+        "#}),
+        TestAction::assert(indoc! {r#"
+            var idx = -1;
+            [10, 20, 30].find((v, i) => { idx = i; return v === 20; });
+            idx === 1
+        "#}),
+        TestAction::assert(indoc! {r#"
+            let arr = [1, , 3];
+            arr.find(x => x === undefined) === undefined
+        "#}),
+    ]);
+}