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diff --git a/gcc/testsuite/gfortran.dg/large_real_kind_form_io_2.f90 b/gcc/testsuite/gfortran.dg/large_real_kind_form_io_2.f90
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+++ b/gcc/testsuite/gfortran.dg/large_real_kind_form_io_2.f90
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+! { dg-do run }
+! { dg-require-effective-target fortran_large_real }
+! PR libfortran/24685
+program large_real_kind_form_io_2
+ ! This should be 10 or 16 on systems that support kind=10 or kind=16
+ integer, parameter :: k = selected_real_kind (precision (0.0_8) + 1)
+ real(kind=k) :: a,b(2), c
+ character(len=180) :: tmp
+
+ b(:) = huge(0.0_k)
+ write (tmp, *) b
+ read (tmp, *) a, c
+ if (a /= b(1)) call abort ()
+ if (c /= b(2)) call abort ()
+
+ b(:) = -huge(0.0_k)
+ write (tmp, *) b
+ read (tmp, *) a, c
+ if (a /= b(1)) call abort ()
+ if (c /= b(2)) call abort ()
+
+ b(:) = tiny(0.0_k)
+ write (tmp, *) b
+ read (tmp, *) a, c
+ if (a /= b(1)) call abort ()
+ if (c /= b(2)) call abort ()
+
+ b(:) = -tiny(0.0_k)
+ write (tmp, *) b
+ read (tmp, *) a, c
+ if (a /= b(1)) call abort ()
+ if (c /= b(2)) call abort ()
+end program large_real_kind_form_io_2