Index: head/contrib/netbsd-tests/lib/libc/gen/t_ftok.c
===================================================================
--- head/contrib/netbsd-tests/lib/libc/gen/t_ftok.c
+++ head/contrib/netbsd-tests/lib/libc/gen/t_ftok.c
@@ -65,7 +65,7 @@
 	key_t k1, k2, k3;
 	int fd;
 
-	fd = open(path, O_RDONLY | O_CREAT);
+	fd = open(path, O_RDONLY | O_CREAT, 0600);
 
 	ATF_REQUIRE(fd >= 0);
 	(void)close(fd);
Index: head/contrib/netbsd-tests/lib/libc/stdio/t_fopen.c
===================================================================
--- head/contrib/netbsd-tests/lib/libc/stdio/t_fopen.c
+++ head/contrib/netbsd-tests/lib/libc/stdio/t_fopen.c
@@ -58,7 +58,7 @@
 	 * used to fdopen(3) a stream is
 	 * closed once the stream is closed.
 	 */
-	fd = open(path, O_RDWR | O_CREAT);
+	fd = open(path, O_RDWR | O_CREAT, 0600);
 
 	ATF_REQUIRE(fd >= 0);
 
@@ -85,7 +85,7 @@
 {
 	int fd;
 
-	fd = open(path, O_RDONLY | O_CREAT);
+	fd = open(path, O_RDONLY | O_CREAT, 0600);
 	ATF_REQUIRE(fd >= 0);
 
 	errno = 0;
@@ -126,7 +126,7 @@
 	 * with the stream corresponds with the offset
 	 * set earlier for the file descriptor.
 	 */
-	fd = open(path, O_RDWR | O_CREAT);
+	fd = open(path, O_RDWR | O_CREAT, 0600);
 
 	ATF_REQUIRE(fd >= 0);
 	ATF_REQUIRE(write(fd, "garbage", 7) == 7);
Index: head/contrib/netbsd-tests/lib/libc/sys/t_access.c
===================================================================
--- head/contrib/netbsd-tests/lib/libc/sys/t_access.c
+++ head/contrib/netbsd-tests/lib/libc/sys/t_access.c
@@ -62,7 +62,7 @@
 	size_t i;
 	int fd;
 
-	fd = open(path, O_RDONLY | O_CREAT);
+	fd = open(path, O_RDONLY | O_CREAT, 0600);
 
 	if (fd < 0)
 		return;
Index: head/contrib/netbsd-tests/lib/libc/sys/t_mprotect.c
===================================================================
--- head/contrib/netbsd-tests/lib/libc/sys/t_mprotect.c
+++ head/contrib/netbsd-tests/lib/libc/sys/t_mprotect.c
@@ -116,7 +116,7 @@
 	size_t i;
 	int fd;
 
-	fd = open(path, O_RDONLY | O_CREAT);
+	fd = open(path, O_RDONLY | O_CREAT, 0600);
 	ATF_REQUIRE(fd >= 0);
 
 	/*
Index: head/contrib/netbsd-tests/lib/libc/sys/t_stat.c
===================================================================
--- head/contrib/netbsd-tests/lib/libc/sys/t_stat.c
+++ head/contrib/netbsd-tests/lib/libc/sys/t_stat.c
@@ -64,7 +64,7 @@
 	(void)memset(&sa, 0, sizeof(struct stat));
 	(void)memset(&sb, 0, sizeof(struct stat));
 
-	fd = open(path, O_RDONLY | O_CREAT);
+	fd = open(path, O_RDONLY | O_CREAT, 0600);
 
 	ATF_REQUIRE(fd != -1);
 	ATF_REQUIRE(stat(path, &sa) == 0);
@@ -210,7 +210,7 @@
 		(void)memset(&sa, 0, sizeof(struct stat));
 		(void)memset(&sb, 0, sizeof(struct stat));
 
-		fd[i] = open(path, O_WRONLY | O_CREAT);
+		fd[i] = open(path, O_WRONLY | O_CREAT, 0600);
 
 		ATF_REQUIRE(fd[i] != -1);
 		ATF_REQUIRE(write(fd[i], "X", 1) == 1);
@@ -254,7 +254,7 @@
 	uid = getuid();
 	gid = getgid();
 
-	fd = open(path, O_RDONLY | O_CREAT);
+	fd = open(path, O_RDONLY | O_CREAT, 0600);
 
 	ATF_REQUIRE(fd != -1);
 	ATF_REQUIRE(fstat(fd, &sa) == 0);
@@ -288,7 +288,7 @@
 	size_t i;
 	int fd;
 
-	fd = open(path, O_WRONLY | O_CREAT);
+	fd = open(path, O_WRONLY | O_CREAT, 0600);
 	ATF_REQUIRE(fd >= 0);
 
 	for (i = 0; i < n; i++) {
@@ -377,7 +377,7 @@
 	(void)memset(&sa, 0, sizeof(struct stat));
 	(void)memset(&sb, 0, sizeof(struct stat));
 
-	fd = open(path, O_WRONLY | O_CREAT);
+	fd = open(path, O_WRONLY | O_CREAT, 0600);
 
 	ATF_REQUIRE(fd >= 0);
 	ATF_REQUIRE(symlink(path, pathlink) == 0);
Index: head/contrib/netbsd-tests/lib/libc/sys/t_write.c
===================================================================
--- head/contrib/netbsd-tests/lib/libc/sys/t_write.c
+++ head/contrib/netbsd-tests/lib/libc/sys/t_write.c
@@ -69,7 +69,7 @@
 	errno = 0;
 	ATF_REQUIRE_ERRNO(EBADF, write(-1, wbuf, sizeof(wbuf)) == -1);
 
-	fd = open(path, O_RDWR | O_CREAT);
+	fd = open(path, O_RDWR | O_CREAT, 0600);
 
 	if (fd >= 0) {
 
@@ -141,7 +141,7 @@
 	size_t i;
 	int fd;
 
-	fd = open(path, O_RDWR | O_CREAT);
+	fd = open(path, O_RDWR | O_CREAT, 0600);
 	ATF_REQUIRE(fd >= 0);
 
 	for (i = 0; i < n; i++) {
@@ -171,7 +171,7 @@
 	size_t i, j;
 	int fd;
 
-	fd = open(path, O_WRONLY | O_CREAT);
+	fd = open(path, O_WRONLY | O_CREAT, 0600);
 	ATF_REQUIRE(fd >= 0);
 
 	(void)memset(buf, 'x', sizeof(buf));