diff --git a/spec/libsass-closed-issues/issue_2779/error-dart-sass b/spec/libsass-closed-issues/issue_2779/error-dart-sass
new file mode 100644
index 0000000000..572644da19
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_2779/error-dart-sass
@@ -0,0 +1,7 @@
+Error: Error: Parent selectors aren't allowed here.
+&b
+^^
+  - 1:1  root stylesheet
+@debug(selector-extend(".a .b", "&b", ndll));
+       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  sass-spec/spec/libsass-closed-issues/issue_2779/input.scss 1:8  root stylesheet
diff --git a/spec/libsass-closed-issues/issue_2779/error-libsass b/spec/libsass-closed-issues/issue_2779/error-libsass
new file mode 100644
index 0000000000..12760216e9
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_2779/error-libsass
@@ -0,0 +1,6 @@
+Error: Parent selectors aren't allowed here.
+        on line 1:33 of sass-spec/spec/libsass-closed-issues/issue_2779/input.scss, in function `selector-extend`
+        from line 1:7 of sass-spec/spec/libsass-closed-issues/issue_2779/input.scss
+>> @debug(selector-extend(".a .b", "&b", ndll));
+
+   --------------------------------^
diff --git a/spec/libsass-closed-issues/issue_2779/error-ruby-sass b/spec/libsass-closed-issues/issue_2779/error-ruby-sass
new file mode 100644
index 0000000000..6d8e6429fc
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_2779/error-ruby-sass
@@ -0,0 +1,3 @@
+Error: $extendee: "&b" is not a valid selector: Invalid CSS after "": expected selector, was "&b" for `selector-extend'
+        on line 1 of sass-spec/spec/libsass-closed-issues/issue_2779/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-closed-issues/issue_2779/input.scss b/spec/libsass-closed-issues/issue_2779/input.scss
new file mode 100644
index 0000000000..41a0fca942
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_2779/input.scss
@@ -0,0 +1 @@
+@debug(selector-extend(".a .b", "&b", ndll));
diff --git a/spec/libsass-closed-issues/issue_2779/output.css b/spec/libsass-closed-issues/issue_2779/output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-closed-issues/issue_2779/status b/spec/libsass-closed-issues/issue_2779/status
new file mode 100644
index 0000000000..1479e19b5f
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_2779/status
@@ -0,0 +1 @@
+65