Add `reuse lint` to tox checks

.gitlab-ci.yml

@@ -52,4 +52,4 @@ test_lint:
   before_script:
     - pip install tox
   script:
-    - tox -e flake8
+    - tox -e flake8,reuse

tox.ini

@@ -7,7 +7,7 @@
 # List Python 3.7 by default as that is the version installed on Debian 10
 # Developers on other systems should set the TOXENV environment
 # variable to the Python versions on their system
-envlist = py37,flake8
+envlist = py37,flake8,reuse
 
 [testenv]
 # Use the system packages for pyopencl, numpy, scipy etc
@@ -36,6 +36,17 @@ deps =
 commands =
     flake8
 
+[testenv:reuse]
+basepython = python3
+skip_install = true
+sitepackages = false
+deps =
+    reuse
+commands =
+    reuse lint
+
+
+# Additional configuration for non-tox tools
 [flake8]
 exclude =
     .git,