diff --git a/packages/babel/test/fixtures/transformation/es6.tail-call/default-parameters-black-es6-block-scoping/actual.js b/packages/babel/test/fixtures/transformation/es6.tail-call/default-parameters-black-es6-block-scoping/actual.js
new file mode 100644
index 0000000000..4322fa1e05
--- /dev/null
+++ b/packages/babel/test/fixtures/transformation/es6.tail-call/default-parameters-black-es6-block-scoping/actual.js
@@ -0,0 +1,6 @@
+function sum(a=1, b=2) {
+  if (b > 0) {
+    return sum(a + 1, b - 1);
+  }
+  return a;
+}
diff --git a/packages/babel/test/fixtures/transformation/es6.tail-call/default-parameters-black-es6-block-scoping/expected.js b/packages/babel/test/fixtures/transformation/es6.tail-call/default-parameters-black-es6-block-scoping/expected.js
new file mode 100644
index 0000000000..c8124c58bc
--- /dev/null
+++ b/packages/babel/test/fixtures/transformation/es6.tail-call/default-parameters-black-es6-block-scoping/expected.js
@@ -0,0 +1,20 @@
+"use strict";
+
+function sum() {
+  var _arguments = arguments;
+  var _again = true;
+
+  _function: while (_again) {
+    let a = _arguments.length <= 0 || _arguments[0] === undefined ? 1 : _arguments[0];
+    _again = false;
+    let b = _arguments.length <= 1 || _arguments[1] === undefined ? 2 : _arguments[1];
+
+    if (b > 0) {
+      _arguments = [a + 1, b - 1];
+      _again = true;
+      a = b = undefined;
+      continue _function;
+    }
+    return a;
+  }
+}
\ No newline at end of file
diff --git a/packages/babel/test/fixtures/transformation/es6.tail-call/default-parameters-black-es6-block-scoping/options.json b/packages/babel/test/fixtures/transformation/es6.tail-call/default-parameters-black-es6-block-scoping/options.json
new file mode 100644
index 0000000000..395feeea94
--- /dev/null
+++ b/packages/babel/test/fixtures/transformation/es6.tail-call/default-parameters-black-es6-block-scoping/options.json
@@ -0,0 +1,3 @@
+{
+  "blacklist": ["es6.blockScoping"]
+}
\ No newline at end of file