diff --git a/middleware/auth_test.go b/middleware/auth_test.go
index 0c41305d..c923b1a4 100644
--- a/middleware/auth_test.go
+++ b/middleware/auth_test.go
@@ -532,7 +532,8 @@ func TestAuthErrorHTTPHandler(t *testing.T) {
 
 	handler := http.HandlerFunc(
 		func(w http.ResponseWriter, _ *http.Request) { // token required
-			_, _ = w.Write([]byte("response body\n"))
+			_, _ = w.Write([]byte("must not be called\n"))
+			t.Error("auth error must be raised before this HTTP handler is called")
 		},
 	)
 
diff --git a/v2/middleware/auth_test.go b/v2/middleware/auth_test.go
index 035ceea0..37baa629 100644
--- a/v2/middleware/auth_test.go
+++ b/v2/middleware/auth_test.go
@@ -530,8 +530,9 @@ func TestAuthErrorHTTPHandler(t *testing.T) {
 	a.AuthErrorHTTPHandler = testErrorHandler1
 
 	handler := http.HandlerFunc(
-		func(w http.ResponseWriter, _ *http.Request) { // token required
-			_, _ = w.Write([]byte("response body\n"))
+		func(w http.ResponseWriter, _ *http.Request) {
+			_, _ = w.Write([]byte("must not be called\n"))
+			t.Error("auth error must be raised before this HTTP handler is called")
 		},
 	)