diff --git a/.travis.yml b/.travis.yml
index 9708ef723..4643342df 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 sudo: required
 dist: trusty
+cache: ccache
 git:
   submodules: false
 language: c
@@ -35,7 +36,7 @@ env:
     - PATH=$PATH:/opt/hermit/bin/
     - HERMIT_ISLE=qemu
     - HERMIT_CPUS=1
-    - HERMIT_MEM="512M"
+    - HERMIT_MEM="128M"
     - HERMIT_KVM="0"
     - HERMIT_VERBOSE="1"
     - CFLAGS_FOR_TARGET="-m64 -O2 -ftree-vectorize"
diff --git a/test.sh b/test.sh
index 1d7b51138..53c0038cd 100644
--- a/test.sh
+++ b/test.sh
@@ -3,7 +3,8 @@
 # do not use this script
 # it is written only for internal tests via Travis CI
 
-FILES="usr/tests/hello usr/tests/hellof usr/tests/hello++ usr/tests/thr_hello usr/tests/pi usr/benchmarks/stream usr/benchmarks/basic"
+FILES="usr/tests/hello usr/tests/hellof usr/tests/hello++ usr/tests/thr_hello usr/tests/pi"
+#FILES="usr/tests/hello usr/tests/hellof usr/tests/hello++ usr/tests/thr_hello usr/tests/pi usr/benchmarks/stream usr/benchmarks/basic"
 PROXY=/opt/hermit/bin/proxy
 
 for f in $FILES; do echo "check $f..."; timeout --kill-after=3m 3m $PROXY $f || exit 1; done