diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index 773c130..6106c13 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -25,6 +25,8 @@ jobs:
             drupal-version: "^9"
           - php-version: "8.0"
             drupal-version: "^9"
+          - php-version: "8.0"
+            drupal-version: "10.0.x-dev"
     env:
       extensions: zip, gd
       key: cache-v1
diff --git a/dist/index.js b/dist/index.js
index 88b57ad..016c208 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -2269,7 +2269,7 @@ async function doScript() {
         ['require', '--dev', `drupal/core-dev:${drupalVersion}`],
     ];
     if (utils.getMajorVersionFromConstraint(drupalVersion) > 8) {
-        commands.push(['require', '--dev', 'phpspec/prophecy-phpunit:^2']);
+        commands.push(['require', '--dev', '--with-all-dependencies', 'phpspec/prophecy-phpunit:^2']);
     }
     if (extraDependencies) {
         commands.push(['require', extraDependencies]);
diff --git a/src/index.js b/src/index.js
index f7879a5..4f16217 100644
--- a/src/index.js
+++ b/src/index.js
@@ -32,7 +32,7 @@ async function doScript() {
         ['require', '--dev', `drupal/core-dev:${drupalVersion}`],
     ];
     if (utils.getMajorVersionFromConstraint(drupalVersion) > 8) {
-        commands.push(['require', '--dev', 'phpspec/prophecy-phpunit:^2', '--with-all-dependencies']);
+        commands.push(['require', '--dev', '--with-all-dependencies', 'phpspec/prophecy-phpunit:^2']);
     }
     if (extraDependencies) {
         commands.push(['require', extraDependencies]);