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diff --git a/gcc/testsuite/gfortran.dg/convert_implied_open.f90 b/gcc/testsuite/gfortran.dg/convert_implied_open.f90
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+++ b/gcc/testsuite/gfortran.dg/convert_implied_open.f90
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+! { dg-do run }
+! { dg-options "-fconvert=swap" }
+! PR 26735 - implied open didn't use to honor -fconvert
+program main
+ implicit none
+ integer (kind=4) :: i1, i2, i3
+ write (10) 1_4
+ close (10)
+ open (10, form="unformatted", access="direct", recl=4)
+ read (10,rec=1) i1
+ read (10,rec=2) i2
+ read (10,rec=3) i3
+ if (i1 /= 4 .or. i2 /= 1 .or. i3 /= 4) call abort
+ close (10,status="delete")
+end program main