diff --git a/src/auth/credentials.rs b/src/auth/credentials.rs
index feb80f1..9f49873 100644
--- a/src/auth/credentials.rs
+++ b/src/auth/credentials.rs
@@ -20,6 +20,15 @@ pub struct CredentialStore {
 impl CredentialStore {
     /// Create a new credential store, testing keyring availability
     pub fn new() -> Self {
+        // Integration tests pin the credentials file, since dirs::home_dir
+        // ignores HOME and USERPROFILE on Windows. Skips the keyring too.
+        #[cfg(all(not(test), feature = "test-support"))]
+        if let Some(path) = std::env::var_os("AUTTER_TEST_CREDENTIALS_PATH") {
+            return Self {
+                backend: Box::new(FileBackend::new(PathBuf::from(path))),
+            };
+        }
+
         // In test builds, always use file-based storage to avoid keyring blocking issues
         #[cfg(test)]
         {
diff --git a/tests/integration/repos/test_repo.rs b/tests/integration/repos/test_repo.rs
index 142dbfb..a71fb67 100644
--- a/tests/integration/repos/test_repo.rs
+++ b/tests/integration/repos/test_repo.rs
@@ -480,10 +480,11 @@ impl DaemonProcess {
 fn configure_test_home_env(command: &mut Command, test_home: &Path) {
     command.env("HOME", test_home);
     // dirs::home_dir uses Windows Known Folders, which ignores HOME and
-    // USERPROFILE. Pin these databases explicitly in test-support binaries.
+    // USERPROFILE. Pin these files explicitly in test-support binaries.
     for (key, filename) in [
         ("AUTTER_TEST_METRICS_DB_PATH", "metrics-db"),
         ("AUTTER_TEST_NOTES_DB_PATH", "notes-db"),
+        ("AUTTER_TEST_CREDENTIALS_PATH", "credentials"),
     ] {
         if !command.get_envs().any(|(name, _)| name == key) {
             command.env(key, test_home.join(".autter/internal").join(filename));