diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d38e8a132..b73a47c31 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -44,9 +44,10 @@ test:
   script:
     - cd build
     - export TDIR=./local_prefix/opt/hermit/x86_64-hermit/extra
-    - export FILES="$TDIR/tests/hello"
+    - export FILES="$TDIR/tests/hello $TDIR/tests/hellof $TDIR/tests/hello++ $TDIR/tests/thr_hello $TDIR/tests/pi $TDIR/benchmarks/stream $TDIR/benchmarks/basic $TDIR/tests/signals $TDIR/tests/test-malloc $TDIR/tests/test-malloc-mt $TDIR/tests/argv_envp"
     - export PROXY=./local_prefix/opt/hermit/bin/proxy
     - for f in $FILES; do echo "check $f..."; HERMIT_ISLE=qemu HERMIT_CPUS=1 HERMIT_KVM=0 HERMIT_VERBOSE=1 timeout --kill-after=5m 5m $PROXY $f || exit 1; done
+    - for f in $FILES; do echo "check $f..."; HERMIT_ISLE=qemu HERMIT_CPUS=2 HERMIT_KVM=0 HERMIT_VERBOSE=1 timeout --kill-after=5m 5m $PROXY $f || exit 1; done
   image: ${IMAGE}
   tags:
     - docker