diff --git a/lib/tempest b/lib/tempest
index 55d15d3099..d8f1b418fb 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -114,7 +114,7 @@ function set_tempest_venv_constraints {
     local tmp_c
     tmp_c=$1
     if [[ $TEMPEST_VENV_UPPER_CONSTRAINTS == "master" ]]; then
-        (cd $REQUIREMENTS_DIR && git show origin/master:upper-constraints.txt) > $tmp_c
+        (cd $REQUIREMENTS_DIR && git show master:upper-constraints.txt) > $tmp_c
     else
         echo "Using $TEMPEST_VENV_UPPER_CONSTRAINTS constraints in Tempest virtual env."
         cat $TEMPEST_VENV_UPPER_CONSTRAINTS > $tmp_c