diff --git a/testsuites/psxtests/ChangeLog b/testsuites/psxtests/ChangeLog
index ec5588e6d9..fe595a5925 100644
--- a/testsuites/psxtests/ChangeLog
+++ b/testsuites/psxtests/ChangeLog
@@ -1,3 +1,9 @@
+2010-08-09	Joel Sherrill <joel.sherrill@oarcorp.com>
+
+	PR 1661/testing
+	* psxchroot01/test.c, psximfs01/init.c, psximfs02/init.c,
+	psxpipe01/init.c: Eliminate most references to RTEMS_Malloc_Heap.
+
 2010-08-09	Ralf Corsépius <ralf.corsepius@rtems.org>
 
 	* psxpasswd02/init.c: Remove unused variable.
diff --git a/testsuites/psxtests/psxchroot01/test.c b/testsuites/psxtests/psxchroot01/test.c
index 25105567fa..ff872bb1e3 100644
--- a/testsuites/psxtests/psxchroot01/test.c
+++ b/testsuites/psxtests/psxchroot01/test.c
@@ -34,7 +34,7 @@
 #include <rtems/libio.h>
 #include <rtems/userenv.h>
 #include <pmacros.h>
-#include <rtems/score/heap.h>
+#include <rtems/libcsupport.h>
 
 void touch( char *file )
 {
@@ -64,8 +64,6 @@ int fileexists( char *file )
 }
 
 #if defined(__rtems__)
-extern Heap_Control  *RTEMS_Malloc_Heap;
-
 int test_main(void)
 #else
 int main(
@@ -76,7 +74,6 @@ int main(
 {
   int status;
   void *alloc_ptr = (void *)0;
-  Heap_Information_block Info;
 /*
  *  This test is the C equivalent of this sequence.
 #mkdir /one
@@ -108,8 +105,7 @@ int main(
   touch( "/one/two/two.test" );
 
   puts( "allocate most of memory - attempt to fail chroot - expect ENOTSUP" );
-  _Heap_Get_information(RTEMS_Malloc_Heap, &Info);
-  alloc_ptr = malloc( Info.Free.largest - 4 );
+  alloc_ptr = malloc( malloc_free_space() - 4 );
   rtems_test_assert( alloc_ptr != NULL );
 
   status = chroot( "/one" );
diff --git a/testsuites/psxtests/psximfs01/init.c b/testsuites/psxtests/psximfs01/init.c
index 8ca65bb0c7..cafac02701 100644
--- a/testsuites/psxtests/psximfs01/init.c
+++ b/testsuites/psxtests/psximfs01/init.c
@@ -17,6 +17,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <errno.h>
+#include <rtems/libcsupport.h>
 
 int TestFd;
 uint8_t Buffer[256];
@@ -207,15 +208,12 @@ void unlink_it(void)
   rtems_test_assert( rc == 0 );
 }
 
-extern Heap_Control  *RTEMS_Malloc_Heap;
-
 rtems_task Init(
   rtems_task_argument argument
 )
 {
   int i;
   void *alloc_ptr = (void *)0;
-  Heap_Information_block Info;
   int position = 0;
   int status = 0;
 
@@ -240,8 +238,7 @@ rtems_task Init(
   /*
    * Allocate the heap, so that extend cannot be successful
    */
-  _Heap_Get_information( RTEMS_Malloc_Heap, &Info );
-  alloc_ptr = malloc( Info.Free.largest-4 );
+  alloc_ptr = malloc( malloc_free_space() - 4 );
 
   extend_helper();
 
diff --git a/testsuites/psxtests/psximfs02/init.c b/testsuites/psxtests/psximfs02/init.c
index 7482fbc528..cafe232e17 100644
--- a/testsuites/psxtests/psximfs02/init.c
+++ b/testsuites/psxtests/psximfs02/init.c
@@ -18,8 +18,8 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <rtems/libio.h>
+#include <rtems/libcsupport.h>
 
-extern Heap_Control  *RTEMS_Malloc_Heap;
 void IMFS_dump( void );
 rtems_task Init(
   rtems_task_argument argument
@@ -85,8 +85,7 @@ rtems_task Init(
   rtems_test_assert( errno == EACCES );
 
   puts( "Allocate most of heap" );
-  _Heap_Get_information( RTEMS_Malloc_Heap, &Info );
-  alloc_ptr = malloc( Info.Free.largest - 150 );
+  alloc_ptr = malloc( malloc_free_space() - 150 );
 
   puts( "Attempt to mount a fs at /dir01 -- expect ENOMEM" );
   status = mount( NULL,
@@ -101,8 +100,7 @@ rtems_task Init(
   free( alloc_ptr );
 
   puts( "Allocate most of heap" );
-  _Heap_Get_information( RTEMS_Malloc_Heap, &Info );
-  alloc_ptr = malloc( Info.Free.largest - 4 );
+  alloc_ptr = malloc( malloc_free_space() - 4 );
 
   puts( "Changing directory to /" );
   status = chdir( "/" );
diff --git a/testsuites/psxtests/psxpipe01/init.c b/testsuites/psxtests/psxpipe01/init.c
index 49d2e00fc2..7ef2e31e32 100644
--- a/testsuites/psxtests/psxpipe01/init.c
+++ b/testsuites/psxtests/psxpipe01/init.c
@@ -16,10 +16,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <errno.h>
-
-#include <rtems/score/heap.h>
-
-extern Heap_Control  *RTEMS_Malloc_Heap;
+#include <rtems/libcsupport.h>
 
 rtems_task Init(
   rtems_task_argument not_used
@@ -29,7 +26,6 @@ rtems_task Init(
   int dummy_fd[2] = {0,0};
   int status = 0;
   void *alloc_ptr = (void *)0;
-  Heap_Information_block Info;
 
   puts( "*** TEST POSIX PIPE CREATION - 01 ***" );
 
@@ -54,8 +50,7 @@ rtems_task Init(
   status |= close( fd[1] );
   rtems_test_assert( status == 0 );
 
-  _Heap_Get_information(RTEMS_Malloc_Heap, &Info);
-  alloc_ptr = malloc(Info.Free.largest-4);
+  alloc_ptr = malloc( malloc_free_space() - 4 );
 
   /* case where mkfifo fails */
   puts( "Init - attempt to create pipe -- expect ENOMEM" );