diff --git a/src/shared/.eslintrc b/src/shared/.eslintrc
new file mode 100644
index 000000000..ab1c5afdf
--- /dev/null
+++ b/src/shared/.eslintrc
@@ -0,0 +1,10 @@
+{
+  "extends": [
+    "../../.eslintrc"
+  ],
+
+  "rules": {
+    // ECMAScript 6
+    "no-var": "error",
+  },
+}
diff --git a/src/shared/compatibility.js b/src/shared/compatibility.js
index 044997400..8a258fcd3 100644
--- a/src/shared/compatibility.js
+++ b/src/shared/compatibility.js
@@ -12,7 +12,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/* eslint no-var: error */
 
 import { isNodeJS } from "./is_node.js";
 
diff --git a/src/shared/message_handler.js b/src/shared/message_handler.js
index 0be2961ec..9f65d0c0a 100644
--- a/src/shared/message_handler.js
+++ b/src/shared/message_handler.js
@@ -12,7 +12,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/* eslint no-var: error, prefer-const: error */
 
 import {
   AbortException,
diff --git a/src/shared/util.js b/src/shared/util.js
index af3be1873..9b2b0edf1 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -12,7 +12,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/* eslint no-var: error */
 
 import "./compatibility.js";