Fix file extension in test

14 jobs for master in 10 minutes and 10 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Dist
passed #281406
dependencies/python3.6

00:00:28

passed #281407
dependencies/python3.7

00:00:28

passed #281401
sdist

00:00:28

passed #281404
macos_sierra
wheel/cp36-cp36m-macosx

00:00:21

passed #281402
wheel/cp36-cp36m-manylinux1

00:00:32

passed #281405
macos_sierra
wheel/cp37-cp37m-macosx

00:00:24

passed #281403
wheel/cp37-cp37m-manylinux1

00:00:31

 
  Test
passed #281408
docs

00:06:18

passed #281412
lint

00:00:26

passed #281411
test/coverage

00:09:14

82.74%
passed #281409
test/python3.6

00:09:16

passed #281410
test/python3.7

00:09:17

 
  Deploy
passed #281413
pages

00:00:18

failed pages:deploy

00:00:00