diff --git a/backend/internal/pkg/tlsfingerprint/dialer_integration_test.go b/backend/internal/pkg/tlsfingerprint/dialer_integration_test.go
index 38cddd0d9f0f..a8729d7523be 100644
--- a/backend/internal/pkg/tlsfingerprint/dialer_integration_test.go
+++ b/backend/internal/pkg/tlsfingerprint/dialer_integration_test.go
@@ -11,6 +11,7 @@ package tlsfingerprint
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"io"
 	"net/http"
 	"strings"
@@ -24,14 +25,18 @@ func skipIfExternalServiceUnavailable(t *testing.T, err error) {
 	t.Helper()
 	if err != nil {
 		// Check for common network/TLS errors that indicate external service issues
-		errStr := err.Error()
+		errStr := strings.ToLower(err.Error())
 		if strings.Contains(errStr, "certificate has expired") ||
 			strings.Contains(errStr, "certificate is not yet valid") ||
 			strings.Contains(errStr, "connection refused") ||
+			strings.Contains(errStr, "connection reset by peer") ||
 			strings.Contains(errStr, "no such host") ||
 			strings.Contains(errStr, "network is unreachable") ||
 			strings.Contains(errStr, "timeout") ||
-			strings.Contains(errStr, "deadline exceeded") {
+			strings.Contains(errStr, "deadline exceeded") ||
+			strings.Contains(errStr, "tls handshake failed: eof") ||
+			strings.Contains(errStr, "unexpected eof") ||
+			errors.Is(err, io.EOF) {
 			t.Skipf("skipping test: external service unavailable: %v", err)
 		}
 		t.Fatalf("failed to get fingerprint: %v", err)