diff --git a/spec/libsass-todo-issues/issue_2057/expected_output.css b/spec/libsass-todo-issues/issue_2057/expected_output.css
new file mode 100644
index 0000000000..164f1fe315
--- /dev/null
+++ b/spec/libsass-todo-issues/issue_2057/expected_output.css
@@ -0,0 +1,5 @@
+:not(.thing) {
+  color: red; }
+
+:not(.bar) {
+  background: blue; }
diff --git a/spec/libsass-todo-issues/issue_2057/input.scss b/spec/libsass-todo-issues/issue_2057/input.scss
new file mode 100644
index 0000000000..4d61f4adea
--- /dev/null
+++ b/spec/libsass-todo-issues/issue_2057/input.scss
@@ -0,0 +1,7 @@
+:not(.thing) {
+    color: red;
+}
+:not(.bar) {
+    @extend .thing;
+    background: blue;
+}
\ No newline at end of file