diff --git a/packages/ses-ava/jsconfig.json b/packages/ses-ava/jsconfig.json
index 63776968c1..7687bbc82e 100644
--- a/packages/ses-ava/jsconfig.json
+++ b/packages/ses-ava/jsconfig.json
@@ -2,10 +2,17 @@
   "compilerOptions": {
     "target": "esnext",
     "module": "esnext",
+    "checkJs": true,
     "noEmit": true,
     "downlevelIteration": true,
     "strictNullChecks": true,
-    "moduleResolution": "node"
+    "moduleResolution": "node",
+    "types": []
   },
-  "include": ["*.js", "*.ts", "src/**/*.js", "src/**/*.ts"]
+  "include": [
+    "*.js",
+    "*.ts",
+    "src/**/*.js",
+    "src/**/*.ts"
+  ]
 }
diff --git a/packages/ses-ava/src/ses-ava-test.js b/packages/ses-ava/src/ses-ava-test.js
index 36038ad9d3..743fe68cd5 100644
--- a/packages/ses-ava/src/ses-ava-test.js
+++ b/packages/ses-ava/src/ses-ava-test.js
@@ -1,4 +1,3 @@
-// @ts-check
 import 'ses';
 import './types.js';
 
diff --git a/packages/ses-ava/src/types.js b/packages/ses-ava/src/types.js
index 8a754254a3..7723612c49 100644
--- a/packages/ses-ava/src/types.js
+++ b/packages/ses-ava/src/types.js
@@ -1,5 +1,3 @@
-// @ts-check
-
 /**
  * @typedef {(...args: unknown[]) => void} Logger
  */