diff --git a/fuzz/Makefile.am b/fuzz/Makefile.am
index d2e3931c00..75407d488b 100644
--- a/fuzz/Makefile.am
+++ b/fuzz/Makefile.am
@@ -6,6 +6,7 @@ AM_CFLAGS +=				\
 AM_CPPFLAGS +=				\
 	$(LIBISC_CFLAGS)		\
 	$(LIBDNS_CFLAGS)		\
+	$(LIBURCU_CFLAGS)		\
 	$(LIBUV_CFLAGS)			\
 	-DFUZZDIR=\"$(abs_srcdir)\"	\
 	-I$(top_srcdir)/lib/dns		\
diff --git a/fuzz/dns_qp.c b/fuzz/dns_qp.c
index 1bc19fa38f..045c8acbf2 100644
--- a/fuzz/dns_qp.c
+++ b/fuzz/dns_qp.c
@@ -16,10 +16,10 @@
 #include <stdbool.h>
 #include <stdint.h>
 
-#include <isc/qsbr.h>
 #include <isc/random.h>
 #include <isc/refcount.h>
 #include <isc/rwlock.h>
+#include <isc/urcu.h>
 #include <isc/util.h>
 
 #include <dns/qp.h>
diff --git a/tests/bench/load-names.c b/tests/bench/load-names.c
index babdd37ef1..94e105ad16 100644
--- a/tests/bench/load-names.c
+++ b/tests/bench/load-names.c
@@ -18,8 +18,8 @@
 #include <isc/hashmap.h>
 #include <isc/ht.h>
 #include <isc/list.h>
-#include <isc/qsbr.h>
 #include <isc/rwlock.h>
+#include <isc/urcu.h>
 #include <isc/util.h>
 
 #include <dns/fixedname.h>
diff --git a/tests/bench/qpmulti.c b/tests/bench/qpmulti.c
index 93b98a0b6a..03dd866264 100644
--- a/tests/bench/qpmulti.c
+++ b/tests/bench/qpmulti.c
@@ -18,6 +18,7 @@
 #include <unistd.h>
 
 #include <isc/async.h>
+#include <isc/barrier.h>
 #include <isc/list.h>
 #include <isc/log.h>
 #include <isc/loop.h>
@@ -25,7 +26,6 @@
 #include <isc/mem.h>
 #include <isc/mutex.h>
 #include <isc/os.h>
-#include <isc/qsbr.h>
 #include <isc/random.h>
 #include <isc/refcount.h>
 #include <isc/rwlock.h>
@@ -33,6 +33,7 @@
 #include <isc/tid.h>
 #include <isc/time.h>
 #include <isc/timer.h>
+#include <isc/urcu.h>
 #include <isc/util.h>
 #include <isc/uv.h>
 
@@ -883,6 +884,9 @@ int
 main(void) {
 	isc_loopmgr_t *loopmgr = NULL;
 	isc_mem_t *mctx = NULL;
+
+	setlinebuf(stdout);
+
 	uint32_t nloops;
 	const char *env_workers = getenv("ISC_TASK_WORKERS");
 
diff --git a/tests/dns/qp_test.c b/tests/dns/qp_test.c
index ee9b30da00..8a1156b537 100644
--- a/tests/dns/qp_test.c
+++ b/tests/dns/qp_test.c
@@ -22,11 +22,11 @@
 #define UNIT_TESTING
 #include <cmocka.h>
 
-#include <isc/qsbr.h>
 #include <isc/random.h>
 #include <isc/refcount.h>
 #include <isc/result.h>
 #include <isc/string.h>
+#include <isc/urcu.h>
 #include <isc/util.h>
 
 #include <dns/name.h>
diff --git a/tests/dns/qpmulti_test.c b/tests/dns/qpmulti_test.c
index d5a5b91d0b..96a2693033 100644
--- a/tests/dns/qpmulti_test.c
+++ b/tests/dns/qpmulti_test.c
@@ -27,10 +27,10 @@
 #include <isc/loop.h>
 #include <isc/magic.h>
 #include <isc/mem.h>
-#include <isc/qsbr.h>
 #include <isc/random.h>
 #include <isc/refcount.h>
 #include <isc/rwlock.h>
+#include <isc/urcu.h>
 #include <isc/util.h>
 
 #include <dns/log.h>
@@ -373,8 +373,7 @@ many_transactions(void *arg) {
 	for (size_t n = 0; n < TRANSACTION_COUNT; n++) {
 		TRACE("transaction %zu", n);
 		one_transaction(qpm);
-		isc__qsbr_quiescent_state(isc_loop_current(loopmgr));
-		isc_loopmgr_wakeup(loopmgr);
+		rcu_quiescent_state();
 	}
 
 	dns_qpmulti_destroy(&qpm);
@@ -387,6 +386,7 @@ ISC_RUN_TEST_IMPL(qpmulti) {
 	setup_items();
 	isc_loop_setup(isc_loop_main(loopmgr), many_transactions, NULL);
 	isc_loopmgr_run(loopmgr);
+	rcu_barrier();
 	isc_loopmgr_destroy(&loopmgr);
 	isc_log_destroy(&dns_lctx);
 }
diff --git a/tests/libtest/Makefile.am b/tests/libtest/Makefile.am
index 68708d463d..1fe4c57b36 100644
--- a/tests/libtest/Makefile.am
+++ b/tests/libtest/Makefile.am
@@ -4,6 +4,7 @@ AM_CPPFLAGS +=			\
 	$(LIBISC_CFLAGS)	\
 	$(LIBDNS_CFLAGS)	\
 	$(LIBNS_CFLAGS)		\
+	$(LIBURCU_CFLAGS)	\
 	$(LIBUV_CFLAGS)		\
 	-I$(top_srcdir)/lib/isc	\
 	-I$(top_srcdir)/lib/dns
diff --git a/tests/libtest/qp.c b/tests/libtest/qp.c
index db45fbcc16..aff5eb3dc6 100644
--- a/tests/libtest/qp.c
+++ b/tests/libtest/qp.c
@@ -18,9 +18,9 @@
 #include <isc/buffer.h>
 #include <isc/loop.h>
 #include <isc/magic.h>
-#include <isc/qsbr.h>
 #include <isc/refcount.h>
 #include <isc/rwlock.h>
+#include <isc/urcu.h>
 #include <isc/util.h>
 
 #include <dns/name.h>
@@ -255,10 +255,10 @@ qp_test_dumpchunks(dns_qp_t *qp) {
 	dumpqp(qp, "qp");
 	for (qp_chunk_t c = 0; c < qp->chunk_max; c++) {
 		printf("qp %p chunk %u base %p "
-		       "used %u free %u immutable %u phase %u\n",
+		       "used %u free %u immutable %u discounted %u\n",
 		       qp, c, qp->base->ptr[c], qp->usage[c].used,
 		       qp->usage[c].free, qp->usage[c].immutable,
-		       qp->usage[c].phase);
+		       qp->usage[c].discounted);
 		used += qp->usage[c].used;
 		free += qp->usage[c].free;
 	}