diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index 29fb975..008c777 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -40,6 +40,7 @@
     virtualenv $VENV_DIR
     source ${VENV_DIR}/bin/activate
     pip install salt${PIP_SALT_VERSION}
+    pip install 'msgpack<1' 'setuptools<45'
 }
 
 setup_mock_bin() {