diff --git a/.travis.yml b/.travis.yml
index b156c87..bd6dde0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,17 +1,11 @@
-language: python
-dist: trusty
-python:
-    - "2.7"
-    - "3.5"
 sudo: required
-before_install:
-    - sudo apt-get -qq update
-    - sudo apt-get install libseccomp-dev cmake
-install:
-    - mkdir build && cd build
-    - cmake .. && make && sudo make install
-    - cd ../bindings/Python && sudo `which python` setup.py install
+
+services:
+  - docker
+
 script:
-    - cd ../../tests/Python_and_core && sudo `which python` test.py
-notifications:
-    slack: onlinejudgeteam:BzBz8UFgmS5crpiblof17K2W
+  - docker build -t judger-test -f tests/Dockerfile-16.04 .
+  - docker run -it --rm -v $PWD:/src judger-test /bin/bash -c "chmod +x tests/runtest.sh && ./tests/runtest.sh"
+
+  - docker build -t judger-test -f tests/Dockerfile-18.04 .
+  - docker run -it --rm -v $PWD:/src judger-test /bin/bash -c "chmod +x tests/runtest.sh && ./tests/runtest.sh"
diff --git a/runtest.sh b/runtest.sh
deleted file mode 100755
index 906a1a5..0000000
--- a/runtest.sh
+++ /dev/null
@@ -1,6 +0,0 @@
-rm -rf build && mkdir build && cd build && cmake ..
-make || exit 1
-make install
-cd ../bindings/Python && rm -rf build
-python setup.py install || exit 1
-cd ../../tests/Python_and_core && python test.py
diff --git a/src/rules/c_cpp.c b/src/rules/c_cpp.c
index e5299d5..fcd7ee9 100644
--- a/src/rules/c_cpp.c
+++ b/src/rules/c_cpp.c
@@ -37,6 +37,9 @@ int c_cpp_seccomp_rules(struct config *_config) {
     if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(open), 1, SCMP_CMP(1, SCMP_CMP_MASKED_EQ, O_WRONLY | O_RDWR, 0)) != 0) {
         return LOAD_SECCOMP_FAILED;
     }
+    if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(openat), 1, SCMP_CMP(2, SCMP_CMP_MASKED_EQ, O_WRONLY | O_RDWR, 0)) != 0) {
+        return LOAD_SECCOMP_FAILED;
+    }
     if (seccomp_load(ctx) != 0) {
         return LOAD_SECCOMP_FAILED;
     }
diff --git a/tests/Dockerfile-16.04 b/tests/Dockerfile-16.04
new file mode 100644
index 0000000..9679e81
--- /dev/null
+++ b/tests/Dockerfile-16.04
@@ -0,0 +1,3 @@
+FROM ubuntu:16.04
+RUN apt-get update && apt-get install -y cmake python python3 libseccomp-dev gcc g++
+WORKDIR /src
diff --git a/tests/Dockerfile-18.04 b/tests/Dockerfile-18.04
new file mode 100644
index 0000000..59c3f1c
--- /dev/null
+++ b/tests/Dockerfile-18.04
@@ -0,0 +1,3 @@
+FROM ubuntu:18.04
+RUN apt-get update && apt-get install -y cmake python python3 python3-pip libseccomp-dev gcc g++ strace && pip3 install setuptools --upgrade
+WORKDIR /src
\ No newline at end of file
diff --git a/tests/runtest.sh b/tests/runtest.sh
new file mode 100755
index 0000000..76ed9c7
--- /dev/null
+++ b/tests/runtest.sh
@@ -0,0 +1,16 @@
+#! /bin/bash
+set -ex
+dir=$PWD
+python -V
+gcc -v
+g++ -v
+
+for py in python2 python3; do
+	cd $dir
+	rm -rf build && mkdir build && cd build && cmake ..
+	make
+	make install
+	cd ../bindings/Python && rm -rf build
+	$py setup.py install
+	cd ../../tests/Python_and_core && $py test.py
+done