diff --git a/integration/typings_test_ts36/tsconfig.json b/integration/typings_test_ts36/tsconfig.json
index c815868e51184..fadb96a081fad 100644
--- a/integration/typings_test_ts36/tsconfig.json
+++ b/integration/typings_test_ts36/tsconfig.json
@@ -1,5 +1,6 @@
 {
   "compilerOptions": {
+    "strict": true,
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
     "module": "commonjs",
@@ -15,7 +16,6 @@
       "es2015.promise"
     ],
     "types": [],
-    "strictNullChecks": true
   },
   "files": [
     "include-all.ts",
diff --git a/integration/typings_test_ts37/tsconfig.json b/integration/typings_test_ts37/tsconfig.json
index 70c8db79e198a..3edf41c42f83e 100644
--- a/integration/typings_test_ts37/tsconfig.json
+++ b/integration/typings_test_ts37/tsconfig.json
@@ -1,5 +1,6 @@
 {
   "compilerOptions": {
+    "strict": true,
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
     "module": "commonjs",
@@ -15,7 +16,6 @@
       "es2015.promise"
     ],
     "types": [],
-    "strictNullChecks": true
   },
   "files": [
     "include-all.ts",