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diff --git a/gcc/testsuite/ada/acats/tests/cxa/cxaa012.a b/gcc/testsuite/ada/acats/tests/cxa/cxaa012.a
new file mode 100644
index 000000000..07523b441
--- /dev/null
+++ b/gcc/testsuite/ada/acats/tests/cxa/cxaa012.a
@@ -0,0 +1,167 @@
+-- CXAA012.A
+--
+--                             Grant of Unlimited Rights
+--
+--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
+--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained 
+--     unlimited rights in the software and documentation contained herein.
+--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making 
+--     this public release, the Government intends to confer upon all 
+--     recipients unlimited rights  equal to those held by the Government.  
+--     These rights include rights to use, duplicate, release or disclose the 
+--     released technical data and computer software in whole or in part, in 
+--     any manner and for any purpose whatsoever, and to have or permit others 
+--     to do so.
+--
+--                                    DISCLAIMER
+--
+--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
+--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED 
+--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
+--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE 
+--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
+--     PARTICULAR PURPOSE OF SAID MATERIAL.
+--*
+--
+-- OBJECTIVE:
+--      Check that the exception Mode_Error is raised when an attempt is made
+--      to read from (perform a Get_Line) or use the predefined End_Of_File 
+--      function on a text file with mode Append_File.
+--      
+-- TEST DESCRIPTION:
+--      A scenario is created that demonstrates the potential for the 
+--      incorrect usage of predefined text processing subprograms, resulting 
+--      from their use with files of the wrong Mode.  This results in the 
+--      raising of Mode_Error exceptions, which is handled within blocks
+--      embedded in the test.
+--      A count is kept to ensure that each anticipated exception is in fact
+--      raised and handled properly.
+--      
+-- APPLICABILITY CRITERIA: 
+--      This test is applicable only to implementations that support text
+--      files.
+--
+--       
+-- CHANGE HISTORY:
+--      06 Dec 94   SAIC    ACVC 2.0
+--      27 Feb 97   PWB.CTA Allowed for non-support of some IO operations
+--!
+
+with Ada.Text_IO;
+with Report;
+
+procedure CXAA012 is
+   use Ada;
+   Text_File     : Text_IO.File_Type;
+   Text_Filename : constant String :=
+                      Report.Legal_File_Name ( Nam => "CXAA012" );
+   Incomplete : exception;
+begin
+
+        Report.Test ("CXAA012", "Check that the exception Mode_Error is " &
+                                "raised when an attempt is made to read " &
+                                "from (perform a Get_Line) or use the "   &
+                                "predefined End_Of_File function on a "   &
+                                "text file with mode Append_File");
+
+        Test_for_Text_IO_Support:
+        begin
+
+        -- Use_Error or Name_Error will be raised if Text_IO operations 
+        -- or external files are not supported.
+
+           Text_IO.Create (Text_File, Text_IO.Out_File, Text_Filename);
+
+      exception
+          when Text_IO.Use_Error | Text_IO.Name_Error =>
+             Report.Not_Applicable
+                ( "Files not supported - Create as Out_File for Text_IO" );
+             raise Incomplete;
+      end Test_for_Text_IO_Support;
+
+      -- The application writes some amount of data to the file.
+
+           Text_IO.Put_Line (Text_File, "Data entered into the file");
+
+           Text_IO.Close (Text_File);
+
+           Operational_Test_Block:
+           declare
+              TC_Number_Of_Forced_Mode_Errors : constant Natural := 2;
+              TC_Mode_Errors : Natural := 0;
+           begin
+
+              Text_IO.Open (Text_File, Text_IO.Append_File, Text_Filename);
+
+              Test_for_Reading:
+              declare
+                 TC_Data   : String (1..80);
+                 TC_Length : Natural := 0;
+              begin
+
+-- During the course of its processing, the application may become confused
+-- and erroneously attempt to read data from the file that is currently in
+-- Append_File mode (instead of the anticipated In_File mode).
+-- This would result in the raising of Mode_Error.
+
+                 Text_IO.Get_Line (Text_File, TC_Data, TC_Length);
+                 Report.Failed ("Exception not raised by Get_Line");
+
+-- An exception handler present within the application handles the exception
+-- and processing can continue.
+
+              exception
+                 when Text_IO.Mode_Error => 
+                    TC_Mode_Errors := TC_Mode_Errors + 1;
+                 when others             => 
+                    Report.Failed ("Exception in Get_Line processing");
+              end Test_for_Reading;
+
+
+              Test_for_End_Of_File:
+              declare
+                 TC_End_Of_File : Boolean;
+              begin
+
+-- Again, during the course of its processing, the application attempts to 
+-- call the End_Of_File function for the file that is currently in
+-- Append_File mode (instead of the anticipated In_File mode).
+
+                 TC_End_Of_File := Text_IO.End_Of_File (Text_File);
+                 Report.Failed ("Exception not raised by End_Of_File");
+
+-- Once again, an exception handler present within the application handles 
+-- the exception and processing continues.
+
+              exception
+                 when Text_IO.Mode_Error => 
+                    TC_Mode_Errors := TC_Mode_Errors + 1;
+                 when others             => 
+                    Report.Failed("Exception in End_Of_File processing");
+              end Test_for_End_Of_File;
+
+
+              if (TC_Mode_Errors /= TC_Number_Of_Forced_Mode_Errors) then
+                 Report.Failed ("Incorrect number of exceptions handled");
+              end if;
+
+           end Operational_Test_Block;
+     
+           -- Delete the external file.
+           if Text_IO.Is_Open (Text_File) then
+              Text_IO.Delete (Text_File);     
+           else
+              Text_IO.Open (Text_File, Text_IO.In_File, Text_Filename);
+              Text_IO.Delete (Text_File);     
+           end if;
+         
+        Report.Result;
+
+exception
+   when Incomplete =>
+      Report.Result;
+   when others     =>
+      Report.Failed ( "Unexpected exception" );
+      Report.Result;
+
+end CXAA012;