diff --git a/tests/sys/fs/fusefs/create.cc b/tests/sys/fs/fusefs/create.cc
index 14b2a60459a6..0ba7ea87ec11 100644
--- a/tests/sys/fs/fusefs/create.cc
+++ b/tests/sys/fs/fusefs/create.cc
@@ -204,7 +204,7 @@ TEST_F(Create, eexist)
 	EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH)
 		.WillOnce(Invoke(ReturnErrno(ENOENT)));
 	expect_create(RELPATH, mode, ReturnErrno(EEXIST));
-	EXPECT_NE(0, open(FULLPATH, O_CREAT | O_EXCL, mode));
+	EXPECT_EQ(-1, open(FULLPATH, O_CREAT | O_EXCL, mode));
 	EXPECT_EQ(EEXIST, errno);
 }
 
@@ -342,7 +342,7 @@ TEST_F(Create, eperm)
 		.WillOnce(Invoke(ReturnErrno(ENOENT)));
 	expect_create(RELPATH, mode, ReturnErrno(EPERM));
 
-	EXPECT_NE(0, open(FULLPATH, O_CREAT | O_EXCL, mode));
+	EXPECT_EQ(-1, open(FULLPATH, O_CREAT | O_EXCL, mode));
 	EXPECT_EQ(EPERM, errno);
 }
 
diff --git a/tests/sys/fs/fusefs/default_permissions.cc b/tests/sys/fs/fusefs/default_permissions.cc
index dbb0d2e45027..5ab353109649 100644
--- a/tests/sys/fs/fusefs/default_permissions.cc
+++ b/tests/sys/fs/fusefs/default_permissions.cc
@@ -749,7 +749,7 @@ TEST_F(Open, eacces)
 	expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1);
 	expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX);
 
-	EXPECT_NE(0, open(FULLPATH, O_RDWR));
+	EXPECT_EQ(-1, open(FULLPATH, O_RDWR));
 	EXPECT_EQ(EACCES, errno);
 }
 
diff --git a/tests/sys/fs/fusefs/opendir.cc b/tests/sys/fs/fusefs/opendir.cc
index ff3730a055a2..d59feb63fd67 100644
--- a/tests/sys/fs/fusefs/opendir.cc
+++ b/tests/sys/fs/fusefs/opendir.cc
@@ -103,7 +103,7 @@ TEST_F(Opendir, eperm)
 	expect_lookup(RELPATH, ino);
 	expect_opendir(ino, O_RDONLY, ReturnErrno(EPERM));
 
-	EXPECT_NE(0, open(FULLPATH, O_DIRECTORY));
+	EXPECT_EQ(-1, open(FULLPATH, O_DIRECTORY));
 	EXPECT_EQ(EPERM, errno);
 }