diff --git a/tests/sys/fs/fusefs/bmap.cc b/tests/sys/fs/fusefs/bmap.cc
--- a/tests/sys/fs/fusefs/bmap.cc
+++ b/tests/sys/fs/fusefs/bmap.cc
@@ -105,8 +105,8 @@
 	arg.runb = -1;
 	ASSERT_EQ(0, ioctl(fd, FIOBMAP2, &arg)) << strerror(errno);
 	EXPECT_EQ(arg.bn, pbn);
-	EXPECT_EQ(arg.runp, m_maxphys / m_maxbcachebuf - 1);
-	EXPECT_EQ(arg.runb, m_maxphys / m_maxbcachebuf - 1);
+	EXPECT_EQ((unsigned long)arg.runp, m_maxphys / m_maxbcachebuf - 1);
+	EXPECT_EQ((unsigned long)arg.runb, m_maxphys / m_maxbcachebuf - 1);
 
 	leak(fd);
 }
@@ -142,7 +142,7 @@
 	arg.runb = -1;
 	ASSERT_EQ(0, ioctl(fd, FIOBMAP2, &arg)) << strerror(errno);
 	EXPECT_EQ(arg.bn, 0);
-	EXPECT_EQ(arg.runp, m_maxphys / m_maxbcachebuf - 1);
+	EXPECT_EQ((unsigned long )arg.runp, m_maxphys / m_maxbcachebuf - 1);
 	EXPECT_EQ(arg.runb, 0);
 
 	/* In the middle */
@@ -152,8 +152,8 @@
 	arg.runb = -1;
 	ASSERT_EQ(0, ioctl(fd, FIOBMAP2, &arg)) << strerror(errno);
 	EXPECT_EQ(arg.bn, lbn * m_maxbcachebuf / DEV_BSIZE);
-	EXPECT_EQ(arg.runp, m_maxphys / m_maxbcachebuf - 1);
-	EXPECT_EQ(arg.runb, m_maxphys / m_maxbcachebuf - 1);
+	EXPECT_EQ((unsigned long )arg.runp, m_maxphys / m_maxbcachebuf - 1);
+	EXPECT_EQ((unsigned long )arg.runb, m_maxphys / m_maxbcachebuf - 1);
 
 	/* Last block */
 	lbn = filesize / m_maxbcachebuf - 1;
@@ -163,7 +163,7 @@
 	ASSERT_EQ(0, ioctl(fd, FIOBMAP2, &arg)) << strerror(errno);
 	EXPECT_EQ(arg.bn, lbn * m_maxbcachebuf / DEV_BSIZE);
 	EXPECT_EQ(arg.runp, 0);
-	EXPECT_EQ(arg.runb, m_maxphys / m_maxbcachebuf - 1);
+	EXPECT_EQ((unsigned long )arg.runb, m_maxphys / m_maxbcachebuf - 1);
 
 	leak(fd);
 }
diff --git a/tests/sys/fs/fusefs/read.cc b/tests/sys/fs/fusefs/read.cc
--- a/tests/sys/fs/fusefs/read.cc
+++ b/tests/sys/fs/fusefs/read.cc
@@ -1339,7 +1339,7 @@
 	expect_open(ino, 0, 1);
 	maxcontig = m_noclusterr ? m_maxbcachebuf :
 		m_maxbcachebuf + m_maxreadahead;
-	clustersize = MIN(maxcontig, m_maxphys);
+	clustersize = MIN((unsigned long )maxcontig, m_maxphys);
 	for (offs = 0; offs < bufsize; offs += clustersize) {
 		len = std::min((size_t)clustersize, (size_t)(filesize - offs));
 		expect_read(ino, offs, len, len, contents + offs);
diff --git a/tests/sys/fs/fusefs/utils.hh b/tests/sys/fs/fusefs/utils.hh
--- a/tests/sys/fs/fusefs/utils.hh
+++ b/tests/sys/fs/fusefs/utils.hh
@@ -77,7 +77,7 @@
 
 	public:
 	int m_maxbcachebuf;
-	int m_maxphys;
+	unsigned long m_maxphys;
 
 	FuseTest():
 		m_maxreadahead(0),
diff --git a/tests/sys/fs/fusefs/utils.cc b/tests/sys/fs/fusefs/utils.cc
--- a/tests/sys/fs/fusefs/utils.cc
+++ b/tests/sys/fs/fusefs/utils.cc
@@ -130,8 +130,7 @@
 void FuseTest::SetUp() {
 	const char *maxbcachebuf_node = "vfs.maxbcachebuf";
 	const char *maxphys_node = "kern.maxphys";
-	int val = 0;
-	size_t size = sizeof(val);
+	size_t size;
 
 	/*
 	 * XXX check_environment should be called from FuseEnv::SetUp, but
@@ -141,12 +140,12 @@
 	if (IsSkipped())
 		return;
 
-	ASSERT_EQ(0, sysctlbyname(maxbcachebuf_node, &val, &size, NULL, 0))
-		<< strerror(errno);
-	m_maxbcachebuf = val;
-	ASSERT_EQ(0, sysctlbyname(maxphys_node, &val, &size, NULL, 0))
+	size = sizeof(m_maxbcachebuf);
+	ASSERT_EQ(0, sysctlbyname(maxbcachebuf_node, &m_maxbcachebuf, &size,
+		NULL, 0)) << strerror(errno);
+	size = sizeof(m_maxphys);
+	ASSERT_EQ(0, sysctlbyname(maxphys_node, &m_maxphys, &size, NULL, 0))
 		<< strerror(errno);
-	m_maxphys = val;
 	/*
 	 * Set the default max_write to a distinct value from MAXPHYS to catch
 	 * bugs that confuse the two.
diff --git a/tests/sys/fs/fusefs/write.cc b/tests/sys/fs/fusefs/write.cc
--- a/tests/sys/fs/fusefs/write.cc
+++ b/tests/sys/fs/fusefs/write.cc
@@ -184,7 +184,7 @@
 	if (m_maxphys < 2 * DFLTPHYS)
 		GTEST_SKIP() << "MAXPHYS must be at least twice DFLTPHYS"
 			<< " for this test";
-	if (m_maxphys < 2 * m_maxbcachebuf)
+	if (m_maxphys < 2 * (unsigned long )m_maxbcachebuf)
 		GTEST_SKIP() << "MAXPHYS must be at least twice maxbcachebuf"
 			<< " for this test";
 }
@@ -860,7 +860,8 @@
 	ssize_t halfbufsize, bufsize;
 
 	halfbufsize = m_mock->m_maxwrite;
-	if (halfbufsize >= m_maxbcachebuf || halfbufsize >= m_maxphys)
+	if (halfbufsize >= m_maxbcachebuf ||
+	    (unsigned long )halfbufsize >= m_maxphys)
 		GTEST_SKIP() << "Must lower m_maxwrite for this test";
 	bufsize = halfbufsize * 2;
 	contents = new int[bufsize / sizeof(int)];