diff --git a/.github/workflows/quicktest.yml b/.github/workflows/quicktest.yml
index 7ef1a86..7fa6006 100644
--- a/.github/workflows/quicktest.yml
+++ b/.github/workflows/quicktest.yml
@@ -64,6 +64,10 @@ jobs:
           phpcsstandards/phpcsutils:"dev-develop"
           wp-coding-standards/wpcs:"dev-develop as 3.99" # Alias needed to prevent composer conflict with VIPCS.
 
+      - name: Enable creation of `composer.lock` file
+        if: ${{ matrix.dependencies == 'lowest' }}
+        run: composer config --unset lock
+
       # Install dependencies and handle caching in one go.
       # @link https://github.com/marketplace/actions/install-php-dependencies-with-composer
       - name: Install Composer dependencies
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5eef5ee..dbbae04 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -93,6 +93,10 @@ jobs:
           phpcsstandards/phpcsutils:"${{ env.UTILS_HIGHEST }}"
           wp-coding-standards/wpcs:"${{ env.WPCS_HIGHEST }}"
 
+      - name: Enable creation of `composer.lock` file
+        if: ${{ matrix.dependencies == 'lowest' }}
+        run: composer config --unset lock
+
       # Install dependencies and handle caching in one go.
       # @link https://github.com/marketplace/actions/install-php-dependencies-with-composer
       - name: Install Composer dependencies - normal
@@ -174,6 +178,10 @@ jobs:
           phpcsstandards/phpcsutils:"${{ env.UTILS_HIGHEST }}"
           wp-coding-standards/wpcs:"${{ env.WPCS_HIGHEST }}"
 
+      - name: Enable creation of `composer.lock` file
+        if: ${{ matrix.dependencies == 'lowest' }}
+        run: composer config --unset lock
+
       # Install dependencies and handle caching in one go.
       # @link https://github.com/marketplace/actions/install-php-dependencies-with-composer
       - name: Install Composer dependencies
diff --git a/composer.json b/composer.json
index 58ba0da..689d10e 100644
--- a/composer.json
+++ b/composer.json
@@ -48,7 +48,8 @@
 	"config": {
 		"allow-plugins": {
 			"dealerdirect/phpcodesniffer-composer-installer": true
-		}
+		},
+		"lock": false
 	},
 	"scripts": {
 		"lint": [