diff --git a/test/pet-store-swagger-inheritance.yaml b/test/pet-store-swagger-inheritance.yaml
index 34f06c0..90eca91 100644
--- a/test/pet-store-swagger-inheritance.yaml
+++ b/test/pet-store-swagger-inheritance.yaml
@@ -170,7 +170,7 @@ definitions:
       properties:
         packSize:
           type: integer
-          # format: int32
+          format: int32
           description: the size of the pack the dog is from
           default: 0
           minimum: 0
diff --git a/test/pet-store-swagger-with-base-path.yaml b/test/pet-store-swagger-with-base-path.yaml
index be8a5a3..18ddb82 100644
--- a/test/pet-store-swagger-with-base-path.yaml
+++ b/test/pet-store-swagger-with-base-path.yaml
@@ -181,7 +181,7 @@ definitions:
     properties:
       id:
         type: integer
-        # format: int64
+        format: int64
       name:
         type: string
       tag:
diff --git a/test/pet-store-swagger-with-yaml-anchors.yaml b/test/pet-store-swagger-with-yaml-anchors.yaml
index 3a90da2..b6e4fed 100644
--- a/test/pet-store-swagger-with-yaml-anchors.yaml
+++ b/test/pet-store-swagger-with-yaml-anchors.yaml
@@ -23,7 +23,7 @@ definitions:
     properties:
       id:
         type: integer
-        # format: int64
+        format: int64
       name:
         type: string
       tag:
diff --git a/test/pet-store-swagger.yaml b/test/pet-store-swagger.yaml
index 976b39a..ca14158 100644
--- a/test/pet-store-swagger.yaml
+++ b/test/pet-store-swagger.yaml
@@ -265,7 +265,7 @@ definitions:
     properties:
       id:
         type: integer
-        # format: int64
+        format: int64
       name:
         type: string
       tag: