diff --git a/middleware/http/oauth2/oauth2_middleware_test.go b/middleware/http/oauth2/oauth2_middleware_test.go
index c770a6f3d..e8f67e418 100644
--- a/middleware/http/oauth2/oauth2_middleware_test.go
+++ b/middleware/http/oauth2/oauth2_middleware_test.go
@@ -75,7 +75,8 @@ func TestOAuth2CreatesAuthorizationHeaderGetNativeMetadata(t *testing.T) {
 	}
 
 	log := logger.NewLogger("oauth2.test")
-	oauth2Middleware, _ := NewOAuth2Middleware(log).(*Middleware)
+	oauth2Middleware, ok := NewOAuth2Middleware(log).(*Middleware)
+	require.True(t, ok)
 
 	tc := []struct {
 		name       string
@@ -90,7 +91,6 @@ func TestOAuth2CreatesAuthorizationHeaderGetNativeMetadata(t *testing.T) {
 		{name: "invalid wildcard pathFilter", pathFilter: "*invalid", wantErr: true},
 		{name: "unclosed parenthesis pathFilter", pathFilter: "invalid(", wantErr: true},
 		{name: "unopened parenthesis pathFilter", pathFilter: "invalid)", wantErr: true},
-		{name: "duplicate unclosed parenthesis pathFilter", pathFilter: "invalid(", wantErr: true},
 	}
 
 	for _, tt := range tc {
diff --git a/middleware/http/oauth2clientcredentials/oauth2clientcredentials_middleware.go b/middleware/http/oauth2clientcredentials/oauth2clientcredentials_middleware.go
index c50dd420a..32fd03e5c 100644
--- a/middleware/http/oauth2clientcredentials/oauth2clientcredentials_middleware.go
+++ b/middleware/http/oauth2clientcredentials/oauth2clientcredentials_middleware.go
@@ -121,7 +121,7 @@ func (m *Middleware) GetHandler(_ context.Context, metadata middleware.Metadata)
 				return
 			}
 
-			m.log.Infof("Cached token not found, try get one")
+			m.log.Infof("Cached token not found, attempting to retrieve a new one")
 			token, err := m.tokenProvider.GetToken(r.Context(), conf)
 			if err != nil {
 				m.log.Errorf("Error acquiring token: %s", err)
@@ -160,7 +160,7 @@ func (m *Middleware) getNativeMetadata(metadata middleware.Metadata) (*oAuth2Cli
 	if middlewareMetadata.PathFilter != "" {
 		rx, err := regexp.Compile(middlewareMetadata.PathFilter)
 		if err != nil {
-			errorString += fmt.Sprintf("Parameter 'pathFilter' is not a valid regex: %s. ", err)
+			errorString += "Parameter 'pathFilter' is not a valid regex: " + err.Error() + ". "
 		}
 		middlewareMetadata.pathFilterRegex = rx
 	}
diff --git a/middleware/http/oauth2clientcredentials/oauth2clientcredentials_middleware_benchmark_test.go b/middleware/http/oauth2clientcredentials/oauth2clientcredentials_middleware_benchmark_test.go
index 8b075742c..032cbc11d 100644
--- a/middleware/http/oauth2clientcredentials/oauth2clientcredentials_middleware_benchmark_test.go
+++ b/middleware/http/oauth2clientcredentials/oauth2clientcredentials_middleware_benchmark_test.go
@@ -56,7 +56,8 @@ func BenchmarkTestOAuth2ClientCredentialsGetHandler(b *testing.B) {
 	}
 
 	log := logger.NewLogger("oauth2clientcredentials.test")
-	oauth2clientcredentialsMiddleware, _ := NewOAuth2ClientCredentialsMiddleware(log).(*Middleware)
+	oauth2clientcredentialsMiddleware, ok := NewOAuth2ClientCredentialsMiddleware(log).(*Middleware)
+	require.True(b, ok)
 	oauth2clientcredentialsMiddleware.SetTokenProvider(mockTokenProvider)
 	handler, err := oauth2clientcredentialsMiddleware.GetHandler(b.Context(), metadata)
 	require.NoError(b, err)
@@ -97,7 +98,8 @@ func BenchmarkTestOAuth2ClientCredentialsGetHandlerWithPathFilter(b *testing.B)
 	}
 
 	log := logger.NewLogger("oauth2clientcredentials.test")
-	oauth2clientcredentialsMiddleware, _ := NewOAuth2ClientCredentialsMiddleware(log).(*Middleware)
+	oauth2clientcredentialsMiddleware, ok := NewOAuth2ClientCredentialsMiddleware(log).(*Middleware)
+	require.True(b, ok)
 	oauth2clientcredentialsMiddleware.SetTokenProvider(mockTokenProvider)
 	handler, err := oauth2clientcredentialsMiddleware.GetHandler(b.Context(), metadata)
 	require.NoError(b, err)
diff --git a/middleware/http/oauth2clientcredentials/oauth2clientcredentials_middleware_test.go b/middleware/http/oauth2clientcredentials/oauth2clientcredentials_middleware_test.go
index 75e8d9fda..7fdbc86c6 100644
--- a/middleware/http/oauth2clientcredentials/oauth2clientcredentials_middleware_test.go
+++ b/middleware/http/oauth2clientcredentials/oauth2clientcredentials_middleware_test.go
@@ -108,7 +108,8 @@ func TestOAuth2ClientCredentialsToken(t *testing.T) {
 
 	// Initialize middleware component and inject mocked TokenProvider
 	log := logger.NewLogger("oauth2clientcredentials.test")
-	oauth2clientcredentialsMiddleware, _ := NewOAuth2ClientCredentialsMiddleware(log).(*Middleware)
+	oauth2clientcredentialsMiddleware, ok := NewOAuth2ClientCredentialsMiddleware(log).(*Middleware)
+	require.True(t, ok)
 	oauth2clientcredentialsMiddleware.SetTokenProvider(mockTokenProvider)
 	handler, err := oauth2clientcredentialsMiddleware.GetHandler(t.Context(), metadata)
 	require.NoError(t, err)
@@ -168,7 +169,8 @@ func TestOAuth2ClientCredentialsCache(t *testing.T) {
 
 	// Initialize middleware component and inject mocked TokenProvider
 	log := logger.NewLogger("oauth2clientcredentials.test")
-	oauth2clientcredentialsMiddleware, _ := NewOAuth2ClientCredentialsMiddleware(log).(*Middleware)
+	oauth2clientcredentialsMiddleware, ok := NewOAuth2ClientCredentialsMiddleware(log).(*Middleware)
+	require.True(t, ok)
 	oauth2clientcredentialsMiddleware.SetTokenProvider(mockTokenProvider)
 	handler, err := oauth2clientcredentialsMiddleware.GetHandler(t.Context(), metadata)
 	require.NoError(t, err)
@@ -203,7 +205,8 @@ func TestOAuth2ClientCredentialsCache(t *testing.T) {
 
 func TestOAuth2ClientCredentialsPathFilterGetNativeMetadata(t *testing.T) {
 	log := logger.NewLogger("oauth2clientcredentials.test")
-	m, _ := NewOAuth2ClientCredentialsMiddleware(log).(*Middleware)
+	m, ok := NewOAuth2ClientCredentialsMiddleware(log).(*Middleware)
+	require.True(t, ok)
 
 	baseMiddlewareMetadata := middleware.Metadata{
 		Base: metadata.Base{
@@ -231,7 +234,6 @@ func TestOAuth2ClientCredentialsPathFilterGetNativeMetadata(t *testing.T) {
 		{name: "invalid wildcard pathFilter", pathFilter: "*invalid", wantErr: true},
 		{name: "unclosed parenthesis pathFilter", pathFilter: "invalid(", wantErr: true},
 		{name: "unopened parenthesis pathFilter", pathFilter: "invalid)", wantErr: true},
-		{name: "duplicate unclosed parenthesis pathFilter", pathFilter: "invalid(", wantErr: true},
 	}
 
 	for _, tt := range tc {
@@ -280,7 +282,8 @@ func TestOAuth2ClientCredentialsPathFilterGetHandler(t *testing.T) {
 	}
 
 	log := logger.NewLogger("oauth2clientcredentials.test")
-	oauth2clientcredentialsMiddleware, _ := NewOAuth2ClientCredentialsMiddleware(log).(*Middleware)
+	oauth2clientcredentialsMiddleware, ok := NewOAuth2ClientCredentialsMiddleware(log).(*Middleware)
+	require.True(t, ok)
 	oauth2clientcredentialsMiddleware.SetTokenProvider(mockTokenProvider)
 	handler, err := oauth2clientcredentialsMiddleware.GetHandler(t.Context(), metadata)
 	require.NoError(t, err)