diff --git a/.gitignore b/.gitignore
index e6c26dc825..2fa851ea69 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,4 +40,7 @@ site/.dumi/tmp-production
 
 # Other
 !/src/lib
-!/__tests__/unit/lib
\ No newline at end of file
+!/__tests__/unit/lib
+
+# Package
+package-lock.json
\ No newline at end of file
diff --git a/__tests__/main.ts b/__tests__/main.ts
index 8ab319088a..51ce8e3365 100644
--- a/__tests__/main.ts
+++ b/__tests__/main.ts
@@ -118,7 +118,7 @@ async function plot() {
   currentContainer = document.createElement('div');
   app.append(currentContainer);
   const render = tests[selectChart.value];
-  render(currentContainer);
+  render && render(currentContainer);
 }
 
 function createOption(key) {