diff --git a/index.js b/index.js
index da10cb7e..2df107d4 100644
--- a/index.js
+++ b/index.js
@@ -112,8 +112,8 @@ module.exports = {
     return {
       name: 'strip-test-selectors',
       plugin: StripTestSelectorsTransform,
-      baseDir() { return __dirname; },
-      cacheKey() { return 'strip-test-selectors'; },
+      baseDir: StripTestSelectorsTransform.baseDir,
+      cacheKey: StripTestSelectorsTransform.cacheKey,
     };
   },
 
@@ -123,8 +123,8 @@ module.exports = {
     return {
       name: 'transform-test-selector-params-to-hash-pairs',
       plugin: TransformTestSelectorParamsToHashPairs,
-      baseDir() { return __dirname; },
-      cacheKey() { return 'transform-test-selector-params-to-hash-pairs'; },
+      baseDir: TransformTestSelectorParamsToHashPairs.baseDir,
+      cacheKey: TransformTestSelectorParamsToHashPairs.cacheKey,
     };
   },
 };
diff --git a/strip-test-selectors.js b/strip-test-selectors.js
index 5587c457..febfdfbf 100644
--- a/strip-test-selectors.js
+++ b/strip-test-selectors.js
@@ -29,3 +29,11 @@ module.exports = function() {
     }
   };
 };
+
+module.exports.baseDir = function() {
+  return __dirname;
+};
+
+module.exports.cacheKey = function() {
+  return 'strip-test-selectors';
+};
diff --git a/transform-test-selector-params-to-hash-pairs.js b/transform-test-selector-params-to-hash-pairs.js
index 80b881e9..e229ce7a 100644
--- a/transform-test-selector-params-to-hash-pairs.js
+++ b/transform-test-selector-params-to-hash-pairs.js
@@ -44,3 +44,11 @@ module.exports = function(env) {
     },
   };
 };
+
+module.exports.baseDir = function() {
+  return __dirname;
+};
+
+module.exports.cacheKey = function() {
+  return 'transform-test-selector-params-to-hash-pairs';
+};