diff --git a/.devcontainer/resources/phpbb-config.yml b/.devcontainer/resources/phpbb-config.yml
index 9a9db6abff..9c781c1201 100644
--- a/.devcontainer/resources/phpbb-config.yml
+++ b/.devcontainer/resources/phpbb-config.yml
@@ -30,7 +30,7 @@ installer:
     server:
         cookie_secure: false
         server_protocol: http://
-        force_server_vars: false
+        force_server_vars: true
         server_name: localhost
         server_port: 80
         script_path: /
diff --git a/.devcontainer/resources/setup.sh b/.devcontainer/resources/setup.sh
index b871db11df..9d01fdf16d 100644
--- a/.devcontainer/resources/setup.sh
+++ b/.devcontainer/resources/setup.sh
@@ -34,6 +34,14 @@ sudo ln -s /workspaces/phpbb/phpBB /var/www/html
 echo "[Codespaces] Copy phpBB configuration"
 cp /workspaces/phpbb/.devcontainer/resources/phpbb-config.yml /workspaces/phpbb/phpBB/install/install-config.yml
 
+# Force the server URL to reflect the Codespace
+# https://docs.github.com/en/codespaces/developing-in-a-codespace/default-environment-variables-for-your-codespace
+if [ "$CODESPACES" = true ] ; then
+    echo "[Codespaces] Set the phpBB server name using default environment variables"
+    codespaces_url="${CODESPACE_NAME}-80.${GITHUB_CODESPACES_PORT_FORWARDING_DOMAIN}"
+    sed -i "s/localhost/$codespaces_url/g" /workspaces/phpbb/phpBB/install/install-config.yml
+fi
+
 # Install phpBB
 echo "[Codespaces] Run phpBB CLI installation"
 cd /workspaces/phpbb/phpBB && composer install --no-interaction