diff --git a/docs/source/stubtest.rst b/docs/source/stubtest.rst
index ca291f55947e..a8279eb6c239 100644
--- a/docs/source/stubtest.rst
+++ b/docs/source/stubtest.rst
@@ -41,6 +41,10 @@ stubs and implementation or to check for stub completeness. It's used to
 test Python's official collection of library stubs,
 `typeshed <https://github.com/python/typeshed>`_.
 
+.. warning::
+    
+    stubtest will import and execute Python code from the packages it checks.
+
 Example
 *******