diff --git a/web/routes/test.go b/web/routes/test.go
index a0b0e93..c886c7c 100644
--- a/web/routes/test.go
+++ b/web/routes/test.go
@@ -72,9 +72,11 @@ func TestPostCreate(c flamego.Context, form forms.TestForm, errs binding.Errors)
 
   _ = models.DB.Create(&test)
 
+  // bind benchmarks to test
   for _, v := range form.Benchmarks {
-    fmt.Printf("%s", v)
-    test.Association("Benchmarks").Append(models.Benchmark{ID: v})
+    var benchmark models.Benchmark
+    models.DB.First(&benchmark, v) // find benchmark
+    models.DB.Model(&test).Association("Benchmarks").Append(&benchmark)
   }
 
   c.Redirect(fmt.Sprintf("/test/%d", test.ID))