diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 163c998..4eb7b9b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,9 +50,6 @@ jobs:
       - name: Cygport compile
         run: cygport asciidoc.cygport compile
         timeout-minutes: 5
-      - name: Install pytest-mock
-        run: python3 -m pip install pytest-mock
-        timeout-minutes: 5
       - name: Cygport test
         run: cygport asciidoc.cygport test
         timeout-minutes: 5
diff --git a/build-requires.txt b/build-requires.txt
index a3836e2..d1892f9 100644
--- a/build-requires.txt
+++ b/build-requires.txt
@@ -6,6 +6,6 @@ gettext-devel
 libxml2
 libxslt
 python39-devel
-python39-pytest
+python39-pytest-mock
 python39-wheel
 w3m