diff --git a/test.sh b/test.sh
index 466f114..f4e7c0b 100755
--- a/test.sh
+++ b/test.sh
@@ -4,7 +4,7 @@ set -e
 echo "" > coverage.txt
 
 for d in $(go list ./... | grep -v vendor); do
-    go test -coverprofile=profile.out $d
+    go test -coverprofile=profile.out -coverpkg=github.com/json-iterator/go $d
     if [ -f profile.out ]; then
         cat profile.out >> coverage.txt
         rm profile.out