diff --git a/.travis.yml b/.travis.yml
index c68da13..5d2fa45 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,21 +14,11 @@ python:
 
 before_install:
   - sudo apt-get install -y git mercurial
-  - sudo bash build_wheel_on_travis.sh
+  - sudo bash travis_build_wheel.sh
 
 install:
   - pip install $(cat requirements-test.txt)
 
 script:
   - python --version
-  - python -m flake8 src/pycalver/
-
-  - export MYPYPATH=stubs/
-  - python -m mypy src/pycalver/
-
-  - export PYTHONPATH=src/:$PYTHONPATH
-  - python -m pytest --cov=pycalver test/
-  - codecov
-
-  - rst2html5 --strict README.rst > /dev/null
-  - rst2html5 --strict CHANGELOG.rst > /dev/null
+  - bash travis_run_tests.sh
diff --git a/build_wheel_on_travis.sh b/travis_build_wheel.sh
similarity index 90%
rename from build_wheel_on_travis.sh
rename to travis_build_wheel.sh
index 87efdac..76ecb4d 100644
--- a/build_wheel_on_travis.sh
+++ b/travis_build_wheel.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
-if [ $(which python3.7) ]; then
+set -e
+
+if [[ $(which python3.7) ]]; then
     python3.7 --version
 else
     curl -sSf -o python-3.7.tar.bz2 https://s3.amazonaws.com/travis-python-archives/binaries/ubuntu/16.04/x86_64/python-3.7.tar.bz2
diff --git a/travis_run_tests.sh b/travis_run_tests.sh
new file mode 100644
index 0000000..43edcd4
--- /dev/null
+++ b/travis_run_tests.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+set -e
+
+rst2html5 --strict README.rst > /dev/null
+rst2html5 --strict CHANGELOG.rst > /dev/null
+
+# first test module from installed wheel
+python -m pip install $(ls -1t dist/pycalver*.whl | head -n 1)
+grep 'coding: utf-8' $(python -c 'import pycalver;print(pycalver.__file__)')
+python -m pytest --cov=pycalver test/
+
+if [[ $(python -c "import sys;print(sys.version[:3])") == "3.7" ]]; then
+  python -m flake8 src/pycalver/
+
+  MYPYPATH=stubs/
+  python -m mypy src/pycalver/
+
+  # next test module from src/
+  PYTHONPATH=src/:$PYTHONPATH
+  python -m pytest --cov=pycalver test/
+fi
+
+codecov