Try to learn more about the environment we're running in.

.travis.yml

@@ -4,6 +4,21 @@ jobs:
     - name: "Python 3.9 on Ubuntu 18 (Bionic)"
       dist: bionic
       python: 3.9
+    - name: "Python 3.8 on Ubuntu 18 (Bionic)"
+      dist: bionic
+      python: 3.8
+    - name: "Python 3.7 on Ubuntu 18 (Bionic)"
+      dist: bionic
+      python: 3.7
+    - name: "Python 3.6 on Ubuntu 18 (Bionic)"
+      dist: bionic
+      python: 3.6
+    - name: "Python 3.5 on Ubuntu 18 (Bionic)"
+      dist: bionic
+      python: 3.5
+    - name: "Python 2.7 on Ubuntu 12 (Precise)"
+      dist: precise
+      python: 2.7
     - name: "Python 2.6 on Ubuntu 12 (Precise)"
       dist: precise
       python: 2.6
@@ -30,4 +45,6 @@ jobs:
       env: PATH=/c/Python39:/c/Python39/Scripts:$PATH
 install: true  # Makes it do nothing instead of trying to find a requirements.txt file.
 script:
-  - python test.py
+  - python test.py
+virtualenv:
+  system_site_packages: true  # I think we need this for python to be able to access gi on Linux.

test.py

@@ -77,4 +77,7 @@ def testMissing(self):
 
 if __name__ == '__main__':
     print(version)
+    import sys
+    print(sys.executable)
+    print(sys.path)
     unittest.main()