diff --git a/cmd/docker/builder_test.go b/cmd/docker/builder_test.go
index 5f7875ff83..eac2dc5b23 100644
--- a/cmd/docker/builder_test.go
+++ b/cmd/docker/builder_test.go
@@ -127,7 +127,7 @@ type fakeClient struct {
 	client.Client
 }
 
-func (c *fakeClient) Ping(_ context.Context) (types.Ping, error) {
+func (*fakeClient) Ping(context.Context) (types.Ping, error) {
 	return types.Ping{OSType: "linux"}, nil
 }