fixing path to the test

Author: djarecka

.azure-pipelines/windows.yml

@@ -41,7 +41,7 @@ jobs:
         cd for_testing
         cp ../.coveragerc .
         nosetests --with-doctest --with-coverage --cover-package nibabel nibabel
-        pytest -v nibabel\tests\test_affines.py
+        pytest -v ../nibabel/tests/test_affines.py
       displayName: 'Nose tests'
     - script: |
         cd for_testing

.travis.yml

@@ -132,7 +132,7 @@ script:
           cd for_testing
           cp ../.coveragerc .
           nosetests --with-doctest --with-coverage --cover-package nibabel nibabel
-          pytest -v nibabel/tests/test_affines.py
+          pytest -v ../nibabel/tests/test_affines.py
       else
           false
       fi