diff --git a/test/browserstack/package.json b/test/browserstack/package.json
index 8daa5517e0..8e4e6feb34 100644
--- a/test/browserstack/package.json
+++ b/test/browserstack/package.json
@@ -29,6 +29,7 @@
     "@wdio/selenium-standalone-service": "^5.2.2",
     "@wdio/spec-reporter": "^5.4.3",
     "@wdio/sync": "^5.4.13",
+    "ajv": "6.8.1",
     "browserstack-local": "^1.3.7",
     "chai": "^4.2.0",
     "cross-env": "^5.2.0",
diff --git a/test/wdio/cases/dev/jit-webpack-ts/package.json b/test/wdio/cases/dev/jit-webpack-ts/package.json
index f58da27e98..1e08d79f6c 100644
--- a/test/wdio/cases/dev/jit-webpack-ts/package.json
+++ b/test/wdio/cases/dev/jit-webpack-ts/package.json
@@ -23,6 +23,7 @@
   },
   "devDependencies": {
     "@types/node": "latest",
+    "ajv": "6.8.1",
     "html-loader": "latest",
     "html-webpack-plugin": "latest",
     "http-server": "latest",
diff --git a/test/wdio/cases/local/jit-webpack-ts/package.json b/test/wdio/cases/local/jit-webpack-ts/package.json
index 683388a394..9e25f3b3c3 100644
--- a/test/wdio/cases/local/jit-webpack-ts/package.json
+++ b/test/wdio/cases/local/jit-webpack-ts/package.json
@@ -23,6 +23,7 @@
   },
   "devDependencies": {
     "@types/node": "latest",
+    "ajv": "6.8.1",
     "html-loader": "latest",
     "html-webpack-plugin": "latest",
     "http-server": "latest",