diff --git a/src/schemas/json/partial-mypy.json b/src/schemas/json/partial-mypy.json
index e8872f4944f..dd5c9fbe00f 100644
--- a/src/schemas/json/partial-mypy.json
+++ b/src/schemas/json/partial-mypy.json
@@ -607,6 +607,11 @@
       "default": 0,
       "type": "integer"
     },
+    "num_workers": {
+      "description": "Use the specified number of worker processes to type check in parallel. This is an experimental feature added in mypy 2.0, equivalent to the --num-workers (-n) command line flag. A value of 0 disables parallel checking.",
+      "default": 0,
+      "type": "integer"
+    },
     "show_error_codes": {
       "type": "boolean",
       "default": true,
diff --git a/src/test/pyproject/mypy-01.toml b/src/test/pyproject/mypy-01.toml
index efcb97fe1fd..6461a34540d 100644
--- a/src/test/pyproject/mypy-01.toml
+++ b/src/test/pyproject/mypy-01.toml
@@ -5,6 +5,7 @@
 python_version = "2.7"
 warn_return_any = true
 warn_unused_configs = true
+num_workers = 4
 exclude = [
   '^file1\.py$',  # TOML literal string (single-quotes, no escaping necessary)
   "^file2\\.py$", # TOML basic string (double-quotes, backslash and other characters need escaping)