diff --git a/docker/dev/mtt-php70-apache/compose.yml b/docker/dev/mtt-php70-apache/compose.yml
index 8b454df..77ffc46 100644
--- a/docker/dev/mtt-php70-apache/compose.yml
+++ b/docker/dev/mtt-php70-apache/compose.yml
@@ -5,6 +5,8 @@ services:
     container_name: mtt-dev-php70-apache
     ports:
     - "8080:80"
+    environment:
+    - MTT_ENABLE_DEBUG=YES
     volumes:
     - ../../../src:/var/www/html
     - ./php-mtt.ini:/usr/local/etc/php/conf.d/php-mtt.ini
diff --git a/docker/dev/mtt-php72-apache/compose.yml b/docker/dev/mtt-php72-apache/compose.yml
index 3291170..1d85c61 100644
--- a/docker/dev/mtt-php72-apache/compose.yml
+++ b/docker/dev/mtt-php72-apache/compose.yml
@@ -5,6 +5,8 @@ services:
     container_name: mtt-dev-php72-apache
     ports:
     - "8080:80"
+    environment:
+    - MTT_ENABLE_DEBUG=YES
     volumes:
     - ../../../src:/var/www/html
     - ./php-mtt.ini:/usr/local/etc/php/conf.d/php-mtt.ini
diff --git a/docker/dev/mtt-php74-apache/compose.yml b/docker/dev/mtt-php74-apache/compose.yml
index e1747e6..bb59b91 100644
--- a/docker/dev/mtt-php74-apache/compose.yml
+++ b/docker/dev/mtt-php74-apache/compose.yml
@@ -5,6 +5,8 @@ services:
     container_name: mtt-dev-php74-apache
     ports:
     - "8080:80"
+    environment:
+    - MTT_ENABLE_DEBUG=YES
     volumes:
     - ../../../src:/var/www/html
     - ./php-mtt.ini:/usr/local/etc/php/conf.d/php-mtt.ini
diff --git a/docker/dev/mtt-php80-apache/compose.yml b/docker/dev/mtt-php80-apache/compose.yml
index f570f3c..2530ed5 100644
--- a/docker/dev/mtt-php80-apache/compose.yml
+++ b/docker/dev/mtt-php80-apache/compose.yml
@@ -5,6 +5,8 @@ services:
     container_name: mtt-dev-php80-apache
     ports:
     - "8080:80"
+    environment:
+    - MTT_ENABLE_DEBUG=YES
     volumes:
     - ../../../src:/var/www/html
     - ./php-mtt.ini:/usr/local/etc/php/conf.d/php-mtt.ini