diff --git a/spec/components/version_spec.rb b/spec/components/version_spec.rb
index 6d519a22ae5..345cc251f69 100644
--- a/spec/components/version_spec.rb
+++ b/spec/components/version_spec.rb
@@ -106,7 +106,7 @@ describe Discourse::VERSION do
 
         # Simulate a remote upstream
         `cd #{path} && git remote add origin #{path}/.git && git fetch -q`
-        `cd #{path} && git branch -u origin/$(git branch --show-current)`
+        `cd #{path} && git branch -u origin/$(git rev-parse --abbrev-ref HEAD)`
       end
 
       path