diff --git a/src/metrics/postgres_test.go b/src/metrics/postgres_test.go
index f265d26cbe..cad34b4d00 100644
--- a/src/metrics/postgres_test.go
+++ b/src/metrics/postgres_test.go
@@ -23,7 +23,7 @@ func TestNewPostgresMetricReaderWriter(t *testing.T) {
 	t.Run("ConnectionError", func(*testing.T) {
 		pgrw, err := metrics.NewPostgresMetricReaderWriter(ctx, "postgres://user:pass@foohost:5432/db1")
 		a.Error(err)
-		a.NotNil(pgrw)
+		a.Nil(pgrw)
 	})
 	t.Run("InvalidConnStr", func(*testing.T) {
 		pgrw, err := metrics.NewPostgresMetricReaderWriter(ctx, "invalid_connstr")