diff --git a/README b/README
index 295d67f5..b299c8fc 100644
--- a/README
+++ b/README
@@ -68,6 +68,11 @@ Preparing system for tests (IRIX and Linux):
              - setenv FSTYP "the filesystem you want to test", the filesystem
                type is devised from the TEST_DEV device, but you may want to
                override it; if unset, the default is 'xfs'
+             - setenv FSSTRESS_AVOID and/or FSX_AVOID, which contain options
+               added to the end of fsstresss and fsx invocations, respectively,
+               in case you wish to exclude certain operational modes from these
+               tests.
+
         - or add a case to the switch in common/config assigning
           these variables based on the hostname of your test
           machine
diff --git a/tests/generic/075 b/tests/generic/075
index 8b4ab390..af4f34b2 100755
--- a/tests/generic/075
+++ b/tests/generic/075
@@ -75,7 +75,7 @@ _do_test()
 
     # This cd and use of -P gets full debug on $here (not TEST_DEV)
     cd $out
-    if ! $here/ltp/fsx $_param -P $here $seq.$_n &>/dev/null
+    if ! $here/ltp/fsx $_param -P $here $seq.$_n $FSX_AVOID &>/dev/null
     then
 	echo "    fsx ($_param) failed, $? - compare $seqres.$_n.{good,bad,fsxlog}"
 	mv $out/$seq.$_n $seqres.$_n.full
diff --git a/tests/generic/091 b/tests/generic/091
index bb176f13..e7b60fef 100755
--- a/tests/generic/091
+++ b/tests/generic/091
@@ -46,7 +46,7 @@ run_fsx()
 	echo fsx $@ | tee -a $seqres.full
 	args=`echo $@ | sed -e "s/ BSIZE / $bsize /g" -e "s/ PSIZE / $psize /g"`
 	rm -f $TEST_DIR/junk
-	$here/ltp/fsx $args $TEST_DIR/junk >>$seqres.full 2>&1
+	$here/ltp/fsx $args $FSX_AVOID $TEST_DIR/junk >>$seqres.full 2>&1
 	if [ $? -ne 0 ]; then
 		cat $seqres.full
 		exit 1
diff --git a/tests/generic/112 b/tests/generic/112
index 4918f755..1e34d99d 100755
--- a/tests/generic/112
+++ b/tests/generic/112
@@ -75,7 +75,7 @@ _do_test()
 
     # This cd and use of -P gets full debug on $here (not TEST_DEV)
     cd $out
-    if ! $here/ltp/fsx $_param -P $here $seq.$_n &>/dev/null
+    if ! $here/ltp/fsx $_param -P $here $FSX_AVOID $seq.$_n &>/dev/null
     then
 	echo "    fsx ($_param) returned $? - see $seq.$_n.full"
 	mv $seq.$_n.fsxlog $seqres.$_n.full
diff --git a/tests/generic/127 b/tests/generic/127
index 58ca91ec..f6b7f955 100755
--- a/tests/generic/127
+++ b/tests/generic/127
@@ -51,7 +51,7 @@ _fsx_lite_nommap()
 {
     echo "=== FSX Light Mode, No Memory Mapping ==="
     dd if=/dev/zero of=$TEST_DIR/fsx_lite_nommap bs=${FSX_FILE_SIZE} count=1 > /dev/null 2>&1
-    if ! ltp/fsx $FSX_ARGS -L -R -W $TEST_DIR/fsx_lite_nommap > $tmp.output 2>&1
+    if ! ltp/fsx $FSX_ARGS -L -R -W $FSX_AVOID $TEST_DIR/fsx_lite_nommap > $tmp.output 2>&1
     then
         echo "ltp/fsx $FSX_ARGS -L -R -W $TEST_DIR/fsx_lite_nommap"
         cat $tmp.output
@@ -65,7 +65,7 @@ _fsx_lite_mmap()
 {
     echo "=== FSX Light Mode, Memory Mapping ==="
     dd if=/dev/zero of=$TEST_DIR/fsx_lite_mmap bs=${FSX_FILE_SIZE} count=1 > /dev/null 2>&1
-    if ! ltp/fsx $FSX_ARGS -L $TEST_DIR/fsx_lite_mmap > $tmp.output 2>&1
+    if ! ltp/fsx $FSX_ARGS -L $FSX_AVOID $TEST_DIR/fsx_lite_mmap > $tmp.output 2>&1
     then
     	echo "ltp/fsx $FSX_ARGS -L fsx_lite_mmap"
 	cat $tmp.output
@@ -78,7 +78,7 @@ _fsx_lite_mmap()
 _fsx_std_nommap()
 {
     echo "=== FSX Standard Mode, No Memory Mapping ==="
-    if ! ltp/fsx $FSX_ARGS -R -W $TEST_DIR/fsx_std_nommap > $tmp.output 2>&1
+    if ! ltp/fsx $FSX_ARGS -R -W $FSX_AVOID $TEST_DIR/fsx_std_nommap > $tmp.output 2>&1
     then
         echo "ltp/fsx $FSX_ARGS -R -W fsx_std_nommap"
         cat $tmp.output
@@ -91,7 +91,7 @@ _fsx_std_nommap()
 _fsx_std_mmap()
 {
     echo "=== FSX Standard Mode, Memory Mapping ==="
-    if ! ltp/fsx $FSX_ARGS $TEST_DIR/fsx_std_mmap > $tmp.output 2>&1
+    if ! ltp/fsx $FSX_ARGS $FSX_AVOID $TEST_DIR/fsx_std_mmap > $tmp.output 2>&1
     then
     	echo "ltp/fsx $FSX_ARGS fsx_std_mmap"
 	cat $tmp.output
diff --git a/tests/generic/231 b/tests/generic/231
index a7cff35a..df7d76c6 100755
--- a/tests/generic/231
+++ b/tests/generic/231
@@ -48,7 +48,7 @@ _fsx()
 		SEED=$RANDOM
 		echo "ltp/fsx $FSX_ARGS -S $SEED $SCRATCH_MNT/fsx_file$i" >>$seqres.full
 		su $qa_user -c "ltp/fsx $FSX_ARGS -S $SEED \
-			$SCRATCH_MNT/fsx_file$i" >$tmp.output$i 2>&1 &
+			$FSX_AVOID $SCRATCH_MNT/fsx_file$i" >$tmp.output$i 2>&1 &
 	done
 
 	for (( i = 1; i <= $tasks; i++ )); do
diff --git a/tests/generic/263 b/tests/generic/263
index bc59865e..6ecb74dd 100755
--- a/tests/generic/263
+++ b/tests/generic/263
@@ -46,7 +46,7 @@ run_fsx()
 	echo fsx $@ | tee -a $seqres.full
 	args=`echo $@ | sed -e "s/ BSIZE / $bsize /g" -e "s/ PSIZE / $psize /g"`
 	rm -f $TEST_DIR/junk
-	$here/ltp/fsx $args $TEST_DIR/junk >>$seqres.full 2>&1
+	$here/ltp/fsx $args $FSX_AVOID $TEST_DIR/junk >>$seqres.full 2>&1
 	if [ $? -ne 0 ]; then
 		cat $seqres.full
 		exit 1