diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4a3f27bc4a..06148d03d8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -85,6 +85,7 @@ Coverity:
   variables:
     CC: clang
     CXX: clang++
+    CXXFLAGS: -O0
   artifacts:
     paths: []
     expire_in: 1 minute