diff --git a/internal/certmonitor/certmonitor_test.go b/internal/certmonitor/certmonitor_test.go
index 6ec5a8603..fe40080f2 100644
--- a/internal/certmonitor/certmonitor_test.go
+++ b/internal/certmonitor/certmonitor_test.go
@@ -345,7 +345,6 @@ func TestCertMonitor_Secret(t *testing.T) {
 	verifyPrometheusMetricDelete(t, "namespace-1", "secret-1", "tls.crt")
 }
 
-// TestCertMonitor func tests certificates event handlers + prometheus metrics handling
 func TestCertMonitor_Namespace(t *testing.T) {
 	fleetshardmetrics.MetricsInstance().CertificatesExpiry.Reset()
 
@@ -374,10 +373,19 @@ func TestCertMonitor_Namespace(t *testing.T) {
 			},
 		},
 	}
+	now1 := time.Now().UTC()
+	expirytime := now1.Add(1 * time.Hour)
 
 	mockNamespace := &v1.Namespace{ // pragma: allowlist secret
-		ObjectMeta: metav1.ObjectMeta{Namespace: "namespace-1"},
+		ObjectMeta: metav1.ObjectMeta{Name: "namespace-1"},
 	}
+	secret := &v1.Secret{ // pragma: allowlist secret
+		ObjectMeta: metav1.ObjectMeta{Namespace: mockNamespace.Name, Name: "secret-1"},
+		Data:       map[string][]byte{"tls.crt": generateCertWithExpiration(t, expirytime)},
+	}
+	expirationUnix := float64(expirytime.Unix())
+	certMonitor.handleSecretCreation(secret)
+	verifyPrometheusMetric(t, "namespace-1", "secret-1", "tls.crt", expirationUnix)
 
 	certMonitor.handleNamespaceDeletion(mockNamespace)
 	verifyPrometheusMetricDelete(t, "namespace-1", "secret-1", "tls.crt")