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-rwxr-xr-xtests/basic/tier/tier.t2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/basic/tier/tier.t b/tests/basic/tier/tier.t
index 2a5f7486d7f..851d8b66dad 100755
--- a/tests/basic/tier/tier.t
+++ b/tests/basic/tier/tier.t
@@ -110,7 +110,7 @@ sleep 12
uuidgen >> d1/data2.txt
# Check promotion on read to slow tier
-( cd $M0 ; umount -l $M0 ) # fail but drops kernel cache
+drop_cache $M0
cat d1/data3.txt
sleep 5
EXPECT_WITHIN $PROMOTE_TIMEOUT "0" file_on_fast_tier d1/data2.txt