diff --git a/numpy/f2py/auxfuncs.pyi b/numpy/f2py/auxfuncs.pyi
index 1212f229c660..f2ff09faf33b 100644
--- a/numpy/f2py/auxfuncs.pyi
+++ b/numpy/f2py/auxfuncs.pyi
@@ -10,6 +10,7 @@ from .cfuncs import errmess
 __all__ = [
     "applyrules",
     "containscommon",
+    "containsderivedtypes",
     "debugcapi",
     "dictappend",
     "errmess",
@@ -200,7 +201,7 @@ def isintent_inplace(var: _Var) -> bool: ...
 def isintent_aux(var: _Var) -> bool: ...
 
 #
-def containsderivedtypes(rout: _ROut) -> _Bool: ...
+def containsderivedtypes(rout: _ROut) -> L[0, 1]: ...
 def containscommon(rout: _ROut) -> _Bool: ...
 def hasexternals(rout: _ROut) -> bool: ...
 def hasresultnote(rout: _ROut) -> _Bool: ...
diff --git a/numpy/f2py/diagnose.pyi b/numpy/f2py/diagnose.pyi
index 29cc2b4988b3..b88194ac6bff 100644
--- a/numpy/f2py/diagnose.pyi
+++ b/numpy/f2py/diagnose.pyi
@@ -1,4 +1 @@
-from _typeshed import StrOrBytesPath
-
-def run_command(cmd: StrOrBytesPath) -> None: ...
 def run() -> None: ...