diff --git a/tracer/tracer_test.go b/tracer/tracer_test.go
deleted file mode 100644
index 7388f577..00000000
--- a/tracer/tracer_test.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package tracer
-
-import (
-	"testing"
-)
-
-func TestUniqLabels(t *testing.T) {
-	labels := []interface{}{"key1", "val1", "key1", "val2"}
-	labels = UniqLabels(labels)
-	if labels[1] != "val2" {
-		t.Fatalf("UniqLabels not works")
-	}
-}