diff --git a/.gitlab-ci/deqp-runner.sh b/.gitlab-ci/deqp-runner.sh
index 61f8ad178d0..d8f13f769ac 100755
--- a/.gitlab-ci/deqp-runner.sh
+++ b/.gitlab-ci/deqp-runner.sh
@@ -166,7 +166,7 @@ deqp-runner \
     --jobs ${FDO_CI_CONCURRENT:-4} \
     ${DEQP_RUNNER_MAX_FAILS:+--max-fails "$DEQP_RUNNER_MAX_FAILS"} \
     ${DEQP_RUNNER_SHADER_CACHE_DIR:+--shader-cache-dir "$DEQP_RUNNER_SHADER_CACHE_DIR"} \
-    ${DEQP_FORCE_ASAN:+--env LD_PRELOAD=libasan.so.8:/install/lib/libdlclose-skip.so}; DEQP_EXITCODE=$?
+    ${DEQP_FORCE_ASAN:+--env LD_PRELOAD=libasan.so.8:/install/lib/libdlclose-skip.so --env ASAN_OPTIONS=malloc_fill_byte=1}; DEQP_EXITCODE=$?
 
 { set +x; } 2>/dev/null