diff --git a/run_tests.sh b/run_tests.sh
index faefa3a0..b75ee08d 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -4,6 +4,8 @@ set -e
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
+$SCRIPT_DIR/third_party/ycmd/build.sh
+
 flake8 --select=F,C9 --max-complexity=10 $SCRIPT_DIR/python
 
 for directory in $SCRIPT_DIR/third_party/*; do