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diff --git a/gcc/testsuite/gfortran.dg/streamio_4.f90 b/gcc/testsuite/gfortran.dg/streamio_4.f90
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+++ b/gcc/testsuite/gfortran.dg/streamio_4.f90
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+! { dg-do run }
+! PR25828 Stream IO test 4, Tests string read and writes, single byte.
+! Verifies buffering is working correctly and position="append"
+! Contributed by Jerry DeLisle <jvdelisle@verizon.net>.
+program streamtest
+  implicit none
+  character(1)   :: lf = char(10)
+  character(1)   :: tchar
+  integer        :: i,j,k
+  integer, parameter :: lines = 5231
+   
+  open(10, file="teststream", access="stream", form="formatted")
+  
+  do i=1,lines
+    do j=0,9
+      write(10,"(i5)") j
+    end do
+  end do
+  
+  close(10)
+  
+  open(10, file="teststream", access="stream",&
+  &form="formatted", position="append")
+  do i=1,lines
+    do j=0,9
+      write(10,"(i5)") j
+    end do
+  end do
+  rewind(10)
+  do i=1,lines
+    do j=0,9
+      read(10,"(i5)") k
+      if (k.ne.j) call abort()
+    end do
+  end do
+
+  close(10,status="delete")
+end program streamtest