diff --git a/.github/workflows/tests-ubuntu.yml b/.github/workflows/tests-ubuntu.yml
new file mode 100644
index 0000000..109b600
--- /dev/null
+++ b/.github/workflows/tests-ubuntu.yml
@@ -0,0 +1,19 @@
+name: Ubuntu Tests
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: install dependencies
+      run: pip3 install -r requirements.txt
+    - name: run tests
+      run: bash tests/run-tests.sh
diff --git a/tests/run-tests.sh b/tests/run-tests.sh
index e89d14f..8e3c794 100644
--- a/tests/run-tests.sh
+++ b/tests/run-tests.sh
@@ -85,7 +85,7 @@ while read -r number test_line; do
     eval "curl -s $CHTSH_URL/$test_line" > "$TMP"
   fi
 
-  if ! diff -u3 --color=always results/"$number" "$TMP" > "$TMP2"; then
+  if ! diff -u3 results/"$number" "$TMP" > "$TMP2"; then
     if [[ $update_tests_results = NO ]]; then
       if [ "$show_details" = YES ]; then
         cat "$TMP2"
@@ -109,8 +109,4 @@ else
   echo TESTS/OK/UPDATED "$i/$((i-failed))/$failed"
 fi
 
-if [ "$failed" != 0 ]; then
-  exit 1
-else
-  exit 0
-fi
+test $failed -eq 0