diff --git a/tests/utils/shippable/units.sh b/tests/utils/shippable/units.sh
index e10712b297..a3d05692bd 100755
--- a/tests/utils/shippable/units.sh
+++ b/tests/utils/shippable/units.sh
@@ -23,7 +23,7 @@ esac
 ansible-test env --timeout "${timeout}" --color -v
 
 if [ "$2" == "2.10" ]; then
-    echo "python-gitlab < 2.10.1 ; python_version >= '3.6'" >> tests/unit/requirements.txt
+    sed -i -E 's/^python-gitlab($| .*)/python-gitlab < 2.10.1 ; python_version >= '3.6'/g' tests/unit/requirements.txt
 fi
 
 # shellcheck disable=SC2086