diff --git a/lib/DB.zig b/lib/DB.zig
index e8a959b..a1740d7 100644
--- a/lib/DB.zig
+++ b/lib/DB.zig
@@ -646,8 +646,7 @@ test "getgrnam/getgrgid" {
         try testing.expectEqual(try db.getgrnam("doesnotexist", &buf), null);
         const all = (try db.getgrnam("all", &buf)).?;
         try testing.expectEqual(all.gid, 9999);
-        try testing.expectEqualStrings(all.name[0..3], "all");
-        try testing.expectEqual(all.name[3], 0);
+        try testing.expectEqualStrings(all.name[0..4], "all\x00");
         const members = all.members;
         try testing.expectEqualStrings(mem.sliceTo(members[0].?, 0), "Name" ** 8);
         try testing.expectEqualStrings(mem.sliceTo(members[1].?, 0), "root");
@@ -681,9 +680,9 @@ test "getpwnam/getpwuid" {
         const vidmantas = (try db.getpwnam("vidmantas", &buf)).?;
         try testing.expectEqual(vidmantas.pw_uid, 128);
         try testing.expectEqual(vidmantas.pw_gid, 128);
-        try testing.expectEqualStrings(vidmantas.pw_name[0..9], "vidmantas");
-        try testing.expectEqualStrings(vidmantas.pw_gecos[0..19], "Vidmantas Kaminskas");
-        try testing.expectEqualStrings(vidmantas.pw_dir[0..15], "/home/vidmantas");
+        try testing.expectEqualStrings(vidmantas.pw_name[0..10], "vidmantas\x00");
+        try testing.expectEqualStrings(vidmantas.pw_gecos[0..20], "Vidmantas Kaminskas\x00");
+        try testing.expectEqualStrings(vidmantas.pw_dir[0..16], "/home/vidmantas\x00");
     }
 
     {
@@ -691,10 +690,11 @@ test "getpwnam/getpwuid" {
         const vidmantas = (try db.getpwuid(128, &buf)).?;
         try testing.expectEqual(vidmantas.pw_uid, 128);
         try testing.expectEqual(vidmantas.pw_gid, 128);
-        try testing.expectEqualStrings(vidmantas.pw_name[0..9], "vidmantas");
+        try testing.expectEqualStrings(vidmantas.pw_name[0..10], "vidmantas\x00");
     }
 
-    _ = try db.getpwnam("Name" ** 8, &buf);
+    const long = try db.getpwnam("Name" ** 8, &buf);
+    try testing.expectEqualStrings(long.?.pw_name[0..33], "Name" ** 8 ++ "\x00");
     buf.len -= 1;
     try testing.expectError(error.OutOfMemory, db.getpwnam("Name" ** 8, &buf));
 }