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diff --git a/gcc/testsuite/gfortran.dg/submodule_23.f90 b/gcc/testsuite/gfortran.dg/submodule_23.f90
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+! { dg-do compile }
+!
+! Test the fix for PR79402, in which the module procedure 'fun1' picked
+! up a spurious symbol for the dummy 'n' in the specification expression
+! for the result 'y'.
+!
+! Contributed by Chris Coutinho  <chrisbcoutinho@gmail.com>
+!
+module mod
+  interface myfun
+    module function fun1(n) result(y)
+      integer,  intent(in)    :: n
+      real, dimension(n)  :: y
+    end function fun1
+  end interface myfun
+
+end module mod
+
+submodule (mod) submod
+contains
+  module procedure fun1
+    integer :: i
+    y = [(float (i), i = 1, n)]
+  end procedure fun1
+end submodule
+
+  use mod
+  print *, fun1(10)
+end