4 files changed, 21 insertions, 1 deletions
diff --git a/Lib/doctest.py b/Lib/doctest.py
index 114aac6..1969777 100644
--- a/Lib/doctest.py
+++ b/Lib/doctest.py
@@ -1140,7 +1140,7 @@ class DocTestFinder:
             obj = obj.fget
         if inspect.isfunction(obj) and getattr(obj, '__doc__', None):
             # We don't use `docstring` var here, because `obj` can be changed.
-            obj = obj.__code__
+            obj = inspect.unwrap(obj).__code__
         if inspect.istraceback(obj): obj = obj.tb_frame
         if inspect.isframe(obj): obj = obj.f_code
         if inspect.iscode(obj):
diff --git a/Lib/test/test_doctest/decorator_mod.py b/Lib/test/test_doctest/decorator_mod.py
new file mode 100644
index 0000000..9f10688
--- /dev/null
+++ b/Lib/test/test_doctest/decorator_mod.py
@@ -0,0 +1,10 @@
+# This module is used in `doctest_lineno.py`.
+import functools
+
+
+def decorator(f):
+    @functools.wraps(f)
+    def inner():
+        return f()
+
+    return inner
diff --git a/Lib/test/test_doctest/doctest_lineno.py b/Lib/test/test_doctest/doctest_lineno.py
index 677c569..0dbcd9a 100644
--- a/Lib/test/test_doctest/doctest_lineno.py
+++ b/Lib/test/test_doctest/doctest_lineno.py
@@ -67,3 +67,12 @@ class MethodWrapper:
 
 # https://github.com/python/cpython/issues/99433
 str_wrapper = object().__str__
+
+
+# https://github.com/python/cpython/issues/115392
+from test.test_doctest.decorator_mod import decorator
+
+@decorator
+@decorator
+def func_with_docstring_wrapped():
+    """Some unrelated info."""
diff --git a/Lib/test/test_doctest/test_doctest.py b/Lib/test/test_doctest/test_doctest.py
index 7015255..43be200 100644
--- a/Lib/test/test_doctest/test_doctest.py
+++ b/Lib/test/test_doctest/test_doctest.py
@@ -685,6 +685,7 @@ It used to be broken for quite some time until `bpo-28249`.
      None  test.test_doctest.doctest_lineno.MethodWrapper.method_without_docstring
        61  test.test_doctest.doctest_lineno.MethodWrapper.property_with_doctest
         4  test.test_doctest.doctest_lineno.func_with_docstring
+       77  test.test_doctest.doctest_lineno.func_with_docstring_wrapped
        12  test.test_doctest.doctest_lineno.func_with_doctest
      None  test.test_doctest.doctest_lineno.func_without_docstring