diff --git a/cloud/tq/tq_test.go b/cloud/tq/tq_test.go
index aab68c0e..43e29c00 100644
--- a/cloud/tq/tq_test.go
+++ b/cloud/tq/tq_test.go
@@ -4,10 +4,9 @@ import (
 	"log"
 	"testing"
 
-	"github.com/m-lab/go/prometheusx"
-
 	"github.com/m-lab/etl-gardener/cloud"
 	"github.com/m-lab/etl-gardener/cloud/tq"
+	"github.com/m-lab/go/prometheusx/promtest"
 )
 
 func init() {
@@ -33,5 +32,5 @@ func TestPostOneTask(t *testing.T) {
 
 func TestMetrics(t *testing.T) {
 	tq.EmptyStatsRecoveryTimeHistogramSecs.WithLabelValues("x")
-	prometheusx.LintMetrics(t)
+	promtest.LintMetrics(t)
 }
diff --git a/metrics/metrics_test.go b/metrics/metrics_test.go
index e5bbaa04..e1ee1c5d 100644
--- a/metrics/metrics_test.go
+++ b/metrics/metrics_test.go
@@ -3,7 +3,7 @@ package metrics
 import (
 	"testing"
 
-	"github.com/m-lab/go/prometheusx"
+	"github.com/m-lab/go/prometheusx/promtest"
 )
 
 func TestLintMetrics(t *testing.T) {
@@ -16,5 +16,5 @@ func TestLintMetrics(t *testing.T) {
 	StateTimeHistogram.WithLabelValues("x")
 	FilesPerDateHistogram.WithLabelValues("x")
 	BytesPerDateHistogram.WithLabelValues("x")
-	prometheusx.LintMetrics(t)
+	promtest.LintMetrics(t)
 }