diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 61c4fbf..597128e 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -64,6 +64,6 @@ steps:
 
   - script: |
       cd docs && make doctest && cd ..
-      pytest -v --cov . --cov-report xml:coverage.xml
+      poetry run pytest -v --cov . --cov-report xml:coverage.xml
       ./cc-test-reporter after-build --exit-code $?
     displayName: 'Run tests'
diff --git a/docs/Makefile b/docs/Makefile
index ba501f6..02e0548 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -3,7 +3,7 @@
 
 # You can set these variables from the command line.
 SPHINXOPTS    =
-SPHINXBUILD   = sphinx-build
+SPHINXBUILD   = poetry run sphinx-build
 SOURCEDIR     = source
 BUILDDIR      = build