diff --git a/.github/workflows/ubuntu-unit-tests.sh b/.github/workflows/ubuntu-unit-tests.sh
index 831eab97f8..705b147b96 100755
--- a/.github/workflows/ubuntu-unit-tests.sh
+++ b/.github/workflows/ubuntu-unit-tests.sh
@@ -41,9 +41,8 @@ for phase in "${PHASES[@]}"; do
             if [[ "$phase" = "RUN_CLANG" ]]; then
                 export CC=clang
                 export CXX=clang++
-                MESON_ARGS=(--optimization=1)
             fi
-            meson --werror -Dtests=unsafe -Dslow-tests=true -Dfuzz-tests=true -Dman=true "${MESON_ARGS[@]}" build
+            meson --werror -Dtests=unsafe -Dslow-tests=true -Dfuzz-tests=true -Dman=true build
             ninja -C build -v
             meson test -C build --print-errorlogs
             ;;
diff --git a/travis-ci/managers/debian.sh b/travis-ci/managers/debian.sh
index ad6306744c..39fbb3d65c 100755
--- a/travis-ci/managers/debian.sh
+++ b/travis-ci/managers/debian.sh
@@ -62,9 +62,8 @@ for phase in "${PHASES[@]}"; do
         RUN|RUN_GCC|RUN_CLANG)
             if [[ "$phase" = "RUN_CLANG" ]]; then
                 ENV_VARS="-e CC=clang -e CXX=clang++"
-                MESON_ARGS="--optimization=1"
             fi
-            docker exec $ENV_VARS -it $CONT_NAME meson --werror -Dtests=unsafe -Dslow-tests=true -Dfuzz-tests=true -Dsplit-usr=true -Dman=true $MESON_ARGS build
+            docker exec $ENV_VARS -it $CONT_NAME meson --werror -Dtests=unsafe -Dslow-tests=true -Dfuzz-tests=true -Dsplit-usr=true -Dman=true build
             $DOCKER_EXEC ninja -v -C build
             docker exec -e "TRAVIS=$TRAVIS" -it $CONT_NAME ninja -C build test
             ;;