diff --git a/qa/workunits/cephtool/test.sh b/qa/workunits/cephtool/test.sh
index e3343bdcfc9..7e21363c18e 100755
--- a/qa/workunits/cephtool/test.sh
+++ b/qa/workunits/cephtool/test.sh
@@ -893,8 +893,13 @@ function test_mon_osd()
   # osd blacklist
   #
   bl=192.168.0.1:0/1000
+  # Escaped form which may appear in JSON output
+  bl_json=192.168.0.1:0\\\\/1000
   ceph osd blacklist add $bl
   ceph osd blacklist ls | grep $bl
+  ceph osd blacklist ls --format=json-pretty | grep $bl_json
+  ceph osd dump --format=json-pretty | grep $bl
+  ceph osd dump | grep "^blacklist $bl"
   ceph osd blacklist rm $bl
   expect_false "ceph osd blacklist ls | grep $bl"