diff --git a/testing/scenarios/common_coverage.go b/testing/scenarios/common_coverage.go
index d0c794410..6b14a3682 100644
--- a/testing/scenarios/common_coverage.go
+++ b/testing/scenarios/common_coverage.go
@@ -17,7 +17,7 @@ func BuildV2Ray() error {
 		return nil
 	}
 
-	cmd := exec.Command("go", "test", "-tags", "json coverage coveragemain", "-coverpkg", "v2ray.com/core/...", "-c", "-o", testBinaryPath, GetSourcePath())
+	cmd := exec.Command("go", "test", "-tags", "coverage coveragemain", "-coverpkg", "v2ray.com/core/...", "-c", "-o", testBinaryPath, GetSourcePath())
 	return cmd.Run()
 }
 
diff --git a/testing/scenarios/common_regular.go b/testing/scenarios/common_regular.go
index 6c5662d82..fc3d29970 100644
--- a/testing/scenarios/common_regular.go
+++ b/testing/scenarios/common_regular.go
@@ -16,7 +16,7 @@ func BuildV2Ray() error {
 	}
 
 	fmt.Printf("Building V2Ray into path (%s)\n", testBinaryPath)
-	cmd := exec.Command("go", "build", "-tags=json", "-o="+testBinaryPath, GetSourcePath())
+	cmd := exec.Command("go", "build", "-o="+testBinaryPath, GetSourcePath())
 	return cmd.Run()
 }