diff --git a/test-envs/docker-compose-mysql.yml b/test-envs/docker-compose-mysql.yml
index 002f5b9e..b6edacf0 100644
--- a/test-envs/docker-compose-mysql.yml
+++ b/test-envs/docker-compose-mysql.yml
@@ -1,4 +1,3 @@
-version: '3'
 services:
   db:
     image: mysql:5.7
diff --git a/test-envs/docker-compose-postgres.yml b/test-envs/docker-compose-postgres.yml
index 52ba2945..1e7e7a7d 100644
--- a/test-envs/docker-compose-postgres.yml
+++ b/test-envs/docker-compose-postgres.yml
@@ -1,4 +1,3 @@
-version: '3'
 services:
   db:
     image: postgres:13
diff --git a/test-envs/docker-compose-sqlite.yml b/test-envs/docker-compose-sqlite.yml
index 7a04620c..18db5e68 100644
--- a/test-envs/docker-compose-sqlite.yml
+++ b/test-envs/docker-compose-sqlite.yml
@@ -1,4 +1,3 @@
-version: '3'
 services:
   web:
     build: