diff --git a/packages/core-api/package.json b/packages/core-api/package.json
index de6a14bb2b..43e721683d 100644
--- a/packages/core-api/package.json
+++ b/packages/core-api/package.json
@@ -48,7 +48,8 @@
     "@testing-library/user-event": "^12.0.7",
     "@types/jest": "^26.0.7",
     "@types/node": "^12.0.0",
-    "@types/zen-observable": "^0.8.0"
+    "@types/zen-observable": "^0.8.0",
+    "cross-fetch": "^3.0.6"
   },
   "files": [
     "dist"
diff --git a/packages/core-api/src/setupTests.ts b/packages/core-api/src/setupTests.ts
index 825bcd4115..aea2220869 100644
--- a/packages/core-api/src/setupTests.ts
+++ b/packages/core-api/src/setupTests.ts
@@ -15,3 +15,4 @@
  */
 
 import '@testing-library/jest-dom';
+import 'cross-fetch/polyfill';
diff --git a/packages/e2e-test/src/commands/run.ts b/packages/e2e-test/src/commands/run.ts
index 5f27176fa8..905cb20d52 100644
--- a/packages/e2e-test/src/commands/run.ts
+++ b/packages/e2e-test/src/commands/run.ts
@@ -271,12 +271,7 @@ async function createPlugin(
 
     const pluginDir = resolvePath(appDir, 'plugins', canonicalName);
 
-    for (const cmd of [
-      ['install'],
-      ['tsc'],
-      ['lint'],
-      ['test', '--no-watch'],
-    ]) {
+    for (const cmd of [['tsc'], ['lint'], ['test', '--no-watch']]) {
       print(`Running 'yarn ${cmd.join(' ')}' in newly created plugin`);
       await runPlain(['yarn', ...cmd], { cwd: pluginDir });
     }