diff --git a/.eslintrc.json b/.eslintrc.json
index d02a0310a7..e35c50340c 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -10,6 +10,8 @@
         "plugin:ghost/node"
     ],
     "rules": {
+        // TODO: remove this rule once it's turned into "error" in the base plugin
+        "no-shadow": "error",
         "no-var": "error",
         "one-var": [2, "never"]
     }
diff --git a/test/.eslintrc.json b/test/.eslintrc.json
index 56148d54dc..02501af33d 100644
--- a/test/.eslintrc.json
+++ b/test/.eslintrc.json
@@ -12,6 +12,9 @@
         "plugin:ghost/test"
     ],
     "rules": {
+        // TODO: remove this rule once it's turned into "error" in the base plugin
+        "no-shadow": "error",
+
         // these rules were were not previously enforced in our custom rules,
         // they're turned off here because they _are_ enforced in our plugin.
         // TODO: remove these custom rules and fix the problems in test files where appropriate