diff --git a/testing/spectest/shared/deneb/fork/transition.go b/testing/spectest/shared/deneb/fork/transition.go
index 5946041f5..e6554b159 100644
--- a/testing/spectest/shared/deneb/fork/transition.go
+++ b/testing/spectest/shared/deneb/fork/transition.go
@@ -31,6 +31,9 @@ func RunForkTransitionTest(t *testing.T, config string) {
 	require.NoError(t, utils.SetConfig(t, config))
 
 	testFolders, testsFolderPath := utils.TestFolders(t, config, "deneb", "transition/core/pyspec_tests")
+	if len(testFolders) == 0 {
+		t.Fatalf("No test folders found for %s/%s/%s", config, "deneb", "transition/core/pyspec_tests")
+	}
 	for _, folder := range testFolders {
 		t.Run(folder.Name(), func(t *testing.T) {
 			helpers.ClearCache()