diff --git a/Makefile.in b/Makefile.in
index d923d507..24ab5421 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -167,7 +167,7 @@ DOCS_MAN3 := $(DOCS_XML:$(objroot)%.xml=$(objroot)%.3)
 DOCS := $(DOCS_HTML) $(DOCS_MAN3)
 C_TESTLIB_SRCS := $(srcroot)test/src/btalloc.c $(srcroot)test/src/btalloc_0.c \
 	$(srcroot)test/src/btalloc_1.c $(srcroot)test/src/math.c \
-	$(srcroot)test/src/mtx.c $(srcroot)test/src/mq.c \
+	$(srcroot)test/src/mtx.c $(srcroot)test/src/sleep.c \
 	$(srcroot)test/src/SFMT.c $(srcroot)test/src/test.c \
 	$(srcroot)test/src/thd.c $(srcroot)test/src/timer.c
 ifeq (1, $(link_whole_archive))
diff --git a/test/include/test/jemalloc_test.h.in b/test/include/test/jemalloc_test.h.in
index c46af5d9..a59408fc 100644
--- a/test/include/test/jemalloc_test.h.in
+++ b/test/include/test/jemalloc_test.h.in
@@ -124,6 +124,7 @@ static const bool config_debug =
 #include "test/math.h"
 #include "test/mtx.h"
 #include "test/mq.h"
+#include "test/sleep.h"
 #include "test/test.h"
 #include "test/timer.h"
 #include "test/thd.h"
diff --git a/test/include/test/mq.h b/test/include/test/mq.h
index af2c078d..5dc6486c 100644
--- a/test/include/test/mq.h
+++ b/test/include/test/mq.h
@@ -1,4 +1,4 @@
-void	mq_nanosleep(unsigned ns);
+#include "test/sleep.h"
 
 /*
  * Simple templated message queue implementation that relies on only mutexes for
@@ -82,7 +82,7 @@ a_prefix##get(a_mq_type *mq) {						\
 									\
 	ns = 1;								\
 	while (true) {							\
-		mq_nanosleep(ns);					\
+		sleep_ns(ns);						\
 		msg = a_prefix##tryget(mq);				\
 		if (msg != NULL) {					\
 			return msg;					\
diff --git a/test/include/test/sleep.h b/test/include/test/sleep.h
new file mode 100644
index 00000000..c232f633
--- /dev/null
+++ b/test/include/test/sleep.h
@@ -0,0 +1 @@
+void sleep_ns(unsigned ns);
diff --git a/test/src/mq.c b/test/src/sleep.c
similarity index 89%
rename from test/src/mq.c
rename to test/src/sleep.c
index 9b5f672d..2234b4bc 100644
--- a/test/src/mq.c
+++ b/test/src/sleep.c
@@ -5,11 +5,11 @@
  * time is guaranteed.
  */
 void
-mq_nanosleep(unsigned ns) {
+sleep_ns(unsigned ns) {
 	assert(ns <= 1000*1000*1000);
 
 #ifdef _WIN32
-	Sleep(ns / 1000);
+	Sleep(ns / 1000 / 1000);
 #else
 	{
 		struct timespec timeout;