test: Restrict pypdf to v4.1.0

.github/workflows/checks.yml

@@ -83,7 +83,7 @@ jobs:
         echo "Installing pip + wheel..."
         python -m pip install --upgrade pip wheel
         echo "Installing requirements.txt + test dependencies..."
-        python -m pip install -r requirements.txt tox tox-gh-actions certifi decorator dict2xml pyflakes "pypdf>=4.1.0" "weasyprint>=53.0,!=57.0,!=60.0"
+        python -m pip install -r requirements.txt tox tox-gh-actions certifi decorator dict2xml pyflakes "pypdf==4.1.0" "weasyprint>=53.0,!=57.0,!=60.0"
         
     - name: Generate Valid Tests
       run: |
@@ -135,7 +135,7 @@ jobs:
         echo "Installing pip + wheel..."
         python -m pip install --upgrade pip wheel
         echo "Installing requirements.txt + test dependencies..."
-        python -m pip install -r requirements.txt tox tox-gh-actions certifi decorator dict2xml pyflakes "pypdf>=4.1.0" "weasyprint>=53.0,!=57.0,!=60.0"
+        python -m pip install -r requirements.txt tox tox-gh-actions certifi decorator dict2xml pyflakes "pypdf==4.1.0" "weasyprint>=53.0,!=57.0,!=60.0"
         
     - name: Generate Valid Tests
       run: |
@@ -185,7 +185,7 @@ jobs:
 #         echo "Installing pip + wheel..."
 #         python -m pip install --upgrade pip wheel
 #         echo "Installing requirements.txt + test dependencies..."
-#         python -m pip install -r requirements.txt tox tox-gh-actions certifi decorator dict2xml pyflakes "pypdf>=4.1.0" "weasyprint>=53.0,!=57.0,!=60.0"
+#         python -m pip install -r requirements.txt tox tox-gh-actions certifi decorator dict2xml pyflakes "pypdf==4.1.0" "weasyprint>=53.0,!=57.0,!=60.0"
 #     - name: Generate Valid Tests
 #       run: |
 #         make yestests || true

tox.ini

@@ -33,5 +33,5 @@ deps =
     pyflakes
     decorator
     dict2xml
-    pypdf>=4.1.0
+    pypdf==4.1.0
     weasyprint>=53.0,!=57.0,!=60.0