diff --git a/testing/scenarios/command_test.go b/testing/scenarios/command_test.go
index 7e731b5b..c7914752 100644
--- a/testing/scenarios/command_test.go
+++ b/testing/scenarios/command_test.go
@@ -287,7 +287,7 @@ func TestCommanderListHandlers(t *testing.T) {
 	}
 
 	if diff := cmp.Diff(inboundResp.Inbounds, clientConfig.Inbound, protocmp.Transform()); diff != "" {
-		t.Fatal("inbound response doesn't match config (-want +got):\n%s", diff)
+		t.Fatalf("inbound response doesn't match config (-want +got):\n%s", diff)
 	}
 
 	outboundResp, err := hsClient.ListOutbounds(context.Background(), &command.ListOutboundsRequest{})
@@ -297,7 +297,7 @@ func TestCommanderListHandlers(t *testing.T) {
 	}
 
 	if diff := cmp.Diff(outboundResp.Outbounds, clientConfig.Outbound, protocmp.Transform()); diff != "" {
-		t.Fatal("outbound response doesn't match config (-want +got):\n%s", diff)
+		t.Fatalf("outbound response doesn't match config (-want +got):\n%s", diff)
 	}
 }