diff --git a/tests/draft-next/content.json b/tests/draft-next/content.json
index 3ddbbf6e..37e1f095 100644
--- a/tests/draft-next/content.json
+++ b/tests/draft-next/content.json
@@ -83,7 +83,7 @@
             "$schema": "https://json-schema.org/draft/next/schema",
             "contentMediaType": "application/json",
             "contentEncoding": "base64",
-            "contentSchema": { "required": ["foo"], "properties": { "foo": { "type": "string" } } }
+            "contentSchema": { "type": "object", "required": ["foo"], "properties": { "foo": { "type": "string" } } }
         },
         "tests": [
             {
diff --git a/tests/draft2019-09/content.json b/tests/draft2019-09/content.json
index fba6fa3d..2a7a5d87 100644
--- a/tests/draft2019-09/content.json
+++ b/tests/draft2019-09/content.json
@@ -83,7 +83,7 @@
             "$schema": "https://json-schema.org/draft/2019-09/schema",
             "contentMediaType": "application/json",
             "contentEncoding": "base64",
-            "contentSchema": { "required": ["foo"], "properties": { "foo": { "type": "string" } } }
+            "contentSchema": { "type": "object", "required": ["foo"], "properties": { "foo": { "type": "string" } } }
         },
         "tests": [
             {
diff --git a/tests/draft2020-12/content.json b/tests/draft2020-12/content.json
index 33814d79..698f7805 100644
--- a/tests/draft2020-12/content.json
+++ b/tests/draft2020-12/content.json
@@ -83,7 +83,7 @@
             "$schema": "https://json-schema.org/draft/2020-12/schema",
             "contentMediaType": "application/json",
             "contentEncoding": "base64",
-            "contentSchema": { "required": ["foo"], "properties": { "foo": { "type": "string" } } }
+            "contentSchema": { "type": "object", "required": ["foo"], "properties": { "foo": { "type": "string" } } }
         },
         "tests": [
             {