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diff --git a/gcc/testsuite/gfortran.dg/generic_11.f90 b/gcc/testsuite/gfortran.dg/generic_11.f90
new file mode 100644
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+++ b/gcc/testsuite/gfortran.dg/generic_11.f90
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+! { dg-do compile }
+! Test the fix for PR25135 in which the ambiguity between subroutine
+! foo in m_foo and interface foo in m_bar was not recognised.
+!
+!Contributed by Yusuke IGUCHI <iguchi@coral.t.u-tokyo.ac.jp>
+!
+module m_foo
+contains
+  subroutine foo
+    print *, "foo"
+  end subroutine
+end module
+
+module m_bar
+  interface foo
+    module procedure bar
+  end interface
+contains
+  subroutine bar
+    print *, "bar"
+  end subroutine
+end module
+
+use m_foo
+use m_bar
+
+call foo ! { dg-error "is an ambiguous reference" } 
+end
+! { dg-final { cleanup-modules "m_foo m_bar" } }
+
+