diff --git a/api/server/internal/server/fileserviceimp/storage/localfs_test.go b/api/server/internal/server/fileserviceimp/storage/localfs_test.go
index 68abc372..da1a13bd 100644
--- a/api/server/internal/server/fileserviceimp/storage/localfs_test.go
+++ b/api/server/internal/server/fileserviceimp/storage/localfs_test.go
@@ -369,9 +369,18 @@ func TestCreateLocalFileStorage(t *testing.T) {
 }
 
 func TestCreateLocalFileStorage_InvalidPath(t *testing.T) {
+	// Build a deterministic failure case: the target path already exists as a file.
+	tempDir, err := os.MkdirTemp("", "storage_invalid_path_test")
+	require.NoError(t, err)
+	defer os.RemoveAll(tempDir)
+
+	fileAtTargetPath := filepath.Join(tempDir, "test")
+	err = os.WriteFile(fileAtTargetPath, []byte("not a directory"), 0o644)
+	require.NoError(t, err)
+
 	logger := zap.NewNop()
 	cfg := config.LocalFSSConfig{
-		RootPath: "/invalid/path/that/does/not/exist/and/should/fail",
+		RootPath: tempDir,
 	}
 
 	storage, err := CreateLocalFileStorage(logger, mservice.Storage, "test", "sub", &mockDomainProvider{}, cfg)