diff --git a/ecs/testdata/input/simple-single-service.yaml b/ecs/testdata/input/simple-single-service.yaml
index 448f21108..cf664a431 100644
--- a/ecs/testdata/input/simple-single-service.yaml
+++ b/ecs/testdata/input/simple-single-service.yaml
@@ -1,4 +1,3 @@
-version: "3"
 services:
   simple:
     image: nginx
diff --git a/ecs/testdata/invalid_network_mode.yaml b/ecs/testdata/invalid_network_mode.yaml
index ce8ed8ad5..6e3857513 100644
--- a/ecs/testdata/invalid_network_mode.yaml
+++ b/ecs/testdata/invalid_network_mode.yaml
@@ -1,4 +1,3 @@
-version: "3"
 services:
   simple:
     image: nginx
diff --git a/tests/composefiles/aci-demo/aci_demo_multi_port.yaml b/tests/composefiles/aci-demo/aci_demo_multi_port.yaml
index c4b6f4f81..94651e3d5 100644
--- a/tests/composefiles/aci-demo/aci_demo_multi_port.yaml
+++ b/tests/composefiles/aci-demo/aci_demo_multi_port.yaml
@@ -1,5 +1,3 @@
-version: '3.3'
-
 services:
   db:
     build: db
diff --git a/tests/composefiles/aci-demo/aci_demo_port.yaml b/tests/composefiles/aci-demo/aci_demo_port.yaml
index 7728cfe40..4212bb488 100644
--- a/tests/composefiles/aci-demo/aci_demo_port.yaml
+++ b/tests/composefiles/aci-demo/aci_demo_port.yaml
@@ -1,5 +1,3 @@
-version: '3.3'
-
 services:
   db:
     build: db
diff --git a/tests/composefiles/aci-demo/aci_demo_port_secrets.yaml b/tests/composefiles/aci-demo/aci_demo_port_secrets.yaml
index ea615e884..ea1960158 100644
--- a/tests/composefiles/aci-demo/aci_demo_port_secrets.yaml
+++ b/tests/composefiles/aci-demo/aci_demo_port_secrets.yaml
@@ -1,5 +1,3 @@
-version: '3.3'
-
 services:
   db:
     build: db
diff --git a/tests/composefiles/aci-demo/aci_demo_port_secrets_volumes.yaml b/tests/composefiles/aci-demo/aci_demo_port_secrets_volumes.yaml
index eb4f1b25b..8bc275c6f 100644
--- a/tests/composefiles/aci-demo/aci_demo_port_secrets_volumes.yaml
+++ b/tests/composefiles/aci-demo/aci_demo_port_secrets_volumes.yaml
@@ -1,5 +1,3 @@
-version: '3.3'
-
 services:
   db:
     build: db
diff --git a/tests/composefiles/nginx.yaml b/tests/composefiles/nginx.yaml
index 5f8be2aba..a01210dc4 100644
--- a/tests/composefiles/nginx.yaml
+++ b/tests/composefiles/nginx.yaml
@@ -1,5 +1,3 @@
-version: "3.7"
-
 services:
   nginx:
     image: nginx