btrfs_init_dummy_trans(&trans);
 
        test_msg("Qgroup basic add\n");
-       ret = btrfs_create_qgroup(NULL, fs_info, 5);
+       ret = btrfs_create_qgroup(NULL, fs_info, BTRFS_FS_TREE_OBJECTID);
        if (ret) {
                test_msg("Couldn't create a qgroup %d\n", ret);
                return ret;
                return ret;
        }
 
-       ret = insert_normal_tree_ref(root, nodesize, nodesize, 0, 5);
+       ret = insert_normal_tree_ref(root, nodesize, nodesize, 0,
+                               BTRFS_FS_TREE_OBJECTID);
        if (ret)
                return ret;
 
                return ret;
        }
 
-       if (btrfs_verify_qgroup_counts(fs_info, 5, nodesize, nodesize)) {
+       if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
+                               nodesize, nodesize)) {
                test_msg("Qgroup counts didn't match expected values\n");
                return -EINVAL;
        }
                return -EINVAL;
        }
 
-       if (btrfs_verify_qgroup_counts(fs_info, 5, 0, 0)) {
+       if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID, 0, 0)) {
                test_msg("Qgroup counts didn't match expected values\n");
                return -EINVAL;
        }
 
        test_msg("Qgroup multiple refs test\n");
 
-       /* We have 5 created already from the previous test */
-       ret = btrfs_create_qgroup(NULL, fs_info, 256);
+       /*
+        * We have BTRFS_FS_TREE_OBJECTID created already from the
+        * previous test.
+        */
+       ret = btrfs_create_qgroup(NULL, fs_info, BTRFS_FIRST_FREE_OBJECTID);
        if (ret) {
                test_msg("Couldn't create a qgroup %d\n", ret);
                return ret;
                return ret;
        }
 
-       ret = insert_normal_tree_ref(root, nodesize, nodesize, 0, 5);
+       ret = insert_normal_tree_ref(root, nodesize, nodesize, 0,
+                               BTRFS_FS_TREE_OBJECTID);
        if (ret)
                return ret;
 
                return ret;
        }
 
-       if (btrfs_verify_qgroup_counts(fs_info, 5,
+       if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
                                       nodesize, nodesize)) {
                test_msg("Qgroup counts didn't match expected values\n");
                return -EINVAL;
                return ret;
        }
 
-       ret = add_tree_ref(root, nodesize, nodesize, 0, 256);
+       ret = add_tree_ref(root, nodesize, nodesize, 0,
+                       BTRFS_FIRST_FREE_OBJECTID);
        if (ret)
                return ret;
 
                return ret;
        }
 
-       if (btrfs_verify_qgroup_counts(fs_info, 5, nodesize, 0)) {
+       if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
+                                       nodesize, 0)) {
                test_msg("Qgroup counts didn't match expected values\n");
                return -EINVAL;
        }
 
-       if (btrfs_verify_qgroup_counts(fs_info, 256, nodesize, 0)) {
+       if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID,
+                                       nodesize, 0)) {
                test_msg("Qgroup counts didn't match expected values\n");
                return -EINVAL;
        }
                return ret;
        }
 
-       ret = remove_extent_ref(root, nodesize, nodesize, 0, 256);
+       ret = remove_extent_ref(root, nodesize, nodesize, 0,
+                               BTRFS_FIRST_FREE_OBJECTID);
        if (ret)
                return ret;
 
                return ret;
        }
 
-       if (btrfs_verify_qgroup_counts(fs_info, 256, 0, 0)) {
+       if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID,
+                                       0, 0)) {
                test_msg("Qgroup counts didn't match expected values\n");
                return -EINVAL;
        }
 
-       if (btrfs_verify_qgroup_counts(fs_info, 5, nodesize, nodesize)) {
+       if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
+                                       nodesize, nodesize)) {
                test_msg("Qgroup counts didn't match expected values\n");
                return -EINVAL;
        }
                goto out;
        }
 
-       tmp_root->root_key.objectid = 5;
+       tmp_root->root_key.objectid = BTRFS_FS_TREE_OBJECTID;
        root->fs_info->fs_root = tmp_root;
        ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
        if (ret) {
                goto out;
        }
 
-       tmp_root->root_key.objectid = 256;
+       tmp_root->root_key.objectid = BTRFS_FIRST_FREE_OBJECTID;
        ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
        if (ret) {
                test_msg("Couldn't insert fs root %d\n", ret);