diff --git a/.github/workflows/cs.yml b/.github/workflows/cs.yml
index d3c1e53..bdf3172 100644
--- a/.github/workflows/cs.yml
+++ b/.github/workflows/cs.yml
@@ -41,15 +41,15 @@ jobs:
       - name: Install Composer dependencies
         uses: ramsey/composer-install@v2
         with:
-          # Bust the cache at least once a month - output format: YYYY-MM-DD.
-          custom-cache-suffix: $(date -u -d "-0 month -$(($(date +%d)-1)) days" "+%F")
+          # Bust the cache at least once a month - output format: YYYY-MM.
+          custom-cache-suffix: $(date -u "+%Y-%m")
 
       # Check the codestyle of the files.
       # The results of the CS check will be shown inline in the PR via the CS2PR tool.
       # @link https://github.com/staabm/annotate-pull-request-from-checkstyle/
       - name: Check PHP code style
         id: phpcs
-        run: composer check-cs -- --report-full --report-checkstyle=./phpcs-report.xml
+        run: composer check-cs -- --no-cache --report-full --report-checkstyle=./phpcs-report.xml
 
       - name: Show PHPCS results in PR
         if: ${{ always() && steps.phpcs.outcome == 'failure' }}
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 778adf5..ac0a2a5 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -47,8 +47,8 @@ jobs:
       - name: Install Composer dependencies
         uses: ramsey/composer-install@v2
         with:
-          # Bust the cache at least once a month - output format: YYYY-MM-DD.
-          custom-cache-suffix: $(date -u -d "-0 month -$(($(date +%d)-1)) days" "+%F")
+          # Bust the cache at least once a month - output format: YYYY-MM.
+          custom-cache-suffix: $(date -u "+%Y-%m")
 
       - name: Lint against parse errors
         run: composer lint -- --checkstyle | cs2pr
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 54e1581..e52623f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -45,8 +45,8 @@ jobs:
         if: ${{ matrix.php_version < '7.3' }}
         uses: ramsey/composer-install@v2
         with:
-          # Bust the cache at least once a month - output format: YYYY-MM-DD.
-          custom-cache-suffix: $(date -u -d "-0 month -$(($(date +%d)-1)) days" "+%F")
+          # Bust the cache at least once a month - output format: YYYY-MM.
+          custom-cache-suffix: $(date -u "+%Y-%m")
 
       - name: Install Composer dependencies (PHP 7.3+)
         if: ${{ matrix.php_version >= '7.3' }}
@@ -56,8 +56,8 @@ jobs:
           dependency-versions: "highest"
           # But make it selective.
           composer-options: "yoast/wp-test-utils --with-dependencies --ignore-platform-req=php"
-          # Bust the cache at least once a month - output format: YYYY-MM-DD.
-          custom-cache-suffix: $(date -u -d "-0 month -$(($(date +%d)-1)) days" "+%F")
+          # Bust the cache at least once a month - output format: YYYY-MM.
+          custom-cache-suffix: $(date -u "+%Y-%m")
 
       - name: Run unit tests
         run: composer test