diff --git a/test/fixtures/transformation/es6-tail-call/default-parameters/actual.js b/test/core/fixtures/transformation/es6.tail-call/default-parameters/actual.js
similarity index 97%
rename from test/fixtures/transformation/es6-tail-call/default-parameters/actual.js
rename to test/core/fixtures/transformation/es6.tail-call/default-parameters/actual.js
index 59f5fd60b6..4322fa1e05 100644
--- a/test/fixtures/transformation/es6-tail-call/default-parameters/actual.js
+++ b/test/core/fixtures/transformation/es6.tail-call/default-parameters/actual.js
@@ -3,4 +3,4 @@ function sum(a=1, b=2) {
     return sum(a + 1, b - 1);
   }
   return a;
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/transformation/es6-tail-call/default-parameters/expected.js b/test/core/fixtures/transformation/es6.tail-call/default-parameters/expected.js
similarity index 100%
rename from test/fixtures/transformation/es6-tail-call/default-parameters/expected.js
rename to test/core/fixtures/transformation/es6.tail-call/default-parameters/expected.js