diff --git a/pkgs/development/python-modules/aioboto3/default.nix b/pkgs/development/python-modules/aioboto3/default.nix
index 38aa46b44f53..b22ca1c0420b 100644
--- a/pkgs/development/python-modules/aioboto3/default.nix
+++ b/pkgs/development/python-modules/aioboto3/default.nix
@@ -75,6 +75,17 @@ buildPythonPackage (finalAttrs: {
     "test_s3_copy_multipart"
     "test_s3_download_file_404"
     "test_s3_upload_file"
+  ]
+  ++ [
+    # DynamoDB tests fail with aiobotocore 3.x due to HTTP header issue with moto:
+    # "Duplicate 'Server' header found" - same issue as aiobotocore disables
+    "test_dynamo_resource_query"
+    "test_dynamo_resource_put"
+    "test_dynamo_resource_batch_write_flush_on_exit_context"
+    "test_dynamo_resource_batch_write_flush_amount"
+    "test_flush_doesnt_reset_item_buffer"
+    "test_dynamo_resource_property"
+    "test_dynamo_resource_waiter"
   ];
 
   pythonImportsCheck = [ "aioboto3" ];