diff --git a/test/libc/calls/madvise_test.c b/test/libc/calls/madvise_test.c
index a3ae232ad..e36cdb449 100644
--- a/test/libc/calls/madvise_test.c
+++ b/test/libc/calls/madvise_test.c
@@ -61,6 +61,8 @@ TEST(madvise, short) {
 }
 
 TEST(madvise, zero) {
+  if (IsQemuUser())
+    return;  // doesn't validate flags
   char *p;
   ASSERT_NE(MAP_FAILED, (p = mmap(0, getpagesize(), PROT_READ | PROT_WRITE,
                                   MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)));
@@ -86,7 +88,7 @@ TEST(madvise, madvWillNeed_unmappedRegion) {
   ASSERT_SYS(0, 0, munmap(p + getgransize(), getgransize()));
   if (IsXnu())
     ASSERT_SYS(EINVAL, -1, madvise(p, getgransize() * 3, MADV_WILLNEED));
-  else if (IsBsd() || IsWindows())
+  else if (IsBsd() || IsWindows() || IsQemuUser())
     ASSERT_SYS(0, 0, madvise(p, getgransize() * 3, MADV_WILLNEED));
   else
     ASSERT_SYS(ENOMEM, -1, madvise(p, getgransize() * 3, MADV_WILLNEED));
@@ -102,7 +104,7 @@ TEST(madvise, madvFree_unmappedRegion) {
     ASSERT_SYS(EINVAL, -1, madvise(p, getgransize() * 3, MADV_FREE));
   else if (IsNetbsd() || IsOpenbsd())
     ASSERT_SYS(EFAULT, -1, madvise(p, getgransize() * 3, MADV_FREE));
-  else if (IsFreebsd() || IsWindows())
+  else if (IsFreebsd() || IsWindows() || IsQemuUser())
     ASSERT_SYS(0, 0, madvise(p, getgransize() * 3, MADV_FREE));
   else
     ASSERT_SYS(ENOMEM, -1, madvise(p, getgransize() * 3, MADV_FREE));
diff --git a/test/libc/intrin/BUILD.mk b/test/libc/intrin/BUILD.mk
index 5ca755af0..dcde4ae37 100644
--- a/test/libc/intrin/BUILD.mk
+++ b/test/libc/intrin/BUILD.mk
@@ -44,6 +44,7 @@ TEST_LIBC_INTRIN_DIRECTDEPS =					\
 	TOOL_VIZ_LIB						\
 	THIRD_PARTY_COMPILER_RT					\
 	THIRD_PARTY_NSYNC					\
+	THIRD_PARTY_OPENMP					\
 	THIRD_PARTY_XED
 
 TEST_LIBC_INTRIN_DEPS :=					\
@@ -76,6 +77,10 @@ $(TEST_LIBC_INTRIN_OBJS): private				\
 		CFLAGS +=					\
 			-fno-builtin
 
+$(TEST_LIBC_INTRIN_OBJS): private				\
+		CXXFLAGS +=					\
+			-fopenmp
+
 .PHONY: o/$(MODE)/test/libc/intrin
 o/$(MODE)/test/libc/intrin:					\
 		$(TEST_LIBC_INTRIN_BINS)			\
diff --git a/test/libc/mem/malloc_test.c b/test/libc/mem/malloc_test.c
index 6ce7d23dc..b5336ed12 100644
--- a/test/libc/mem/malloc_test.c
+++ b/test/libc/mem/malloc_test.c
@@ -190,7 +190,7 @@ BENCH(bulk_free, bench) {
 
 #define ITERATIONS 1000
 #define THREADS    10
-#define SIZE       (256 * 1024)
+#define SIZE       (2 * 1024 * 1024)
 
 void *Worker(void *arg) {
   for (int i = 0; i < ITERATIONS; ++i) {
diff --git a/third_party/nsync/common.c b/third_party/nsync/common.c
index 3a20bcdbb..4b4b13d98 100644
--- a/third_party/nsync/common.c
+++ b/third_party/nsync/common.c
@@ -142,7 +142,7 @@ static void free_waiters_push (waiter *w) {
 	w->next_free = atomic_load_explicit (&free_waiters, memory_order_relaxed);
 	while (!atomic_compare_exchange_weak_explicit (&free_waiters, &w->next_free, w,
 						       memory_order_acq_rel, memory_order_relaxed))
-		backoff = pthread_delay_np(free_waiters, backoff);
+		backoff = pthread_delay_np (free_waiters, backoff);
 }
 
 static void free_waiters_populate (void) {
@@ -188,12 +188,11 @@ static waiter *free_waiters_pop (void) {
 			if (atomic_compare_exchange_weak_explicit (&free_waiters, &w, w->next_free,
 								   memory_order_acq_rel, memory_order_relaxed))
 				return w;
-			backoff = pthread_delay_np(free_waiters, backoff);
+			backoff = pthread_delay_np (free_waiters, backoff);
 		} else {
 			free_waiters_populate ();
 		}
 	}
-	return w;
 }
 
 /* -------------------------------- */