--- a/mozharness/mozilla/repo_manifest.py
+++ b/mozharness/mozilla/repo_manifest.py
@@ -174,17 +174,17 @@ def get_project_revision(manifest, proje
 
 
 def remove_group(manifest, group):
     """
     Removes all projects with groups=`group`
     """
     retval = []
     for node in manifest.getElementsByTagName('project'):
-        if node.getAttribute('groups') == group:
+        if group in node.getAttribute('groups').split(","):
             node.parentNode.removeChild(node)
             retval.append(node)
     return retval
 
 
 def map_remote(r, mappings):
     """
     Helper function for mapping git remotes