diff --git a/tests/test-bisect.out b/tests/test-bisect.out
new file mode 100644
--- /dev/null
+++ b/tests/test-bisect.out
@@ -0,0 +1,216 @@
+% init
+% committing changes
+adding a
+% committed changeset 0
+% committed changeset 1
+% committed changeset 2
+% committed changeset 3
+% committed changeset 4
+% committed changeset 5
+% committed changeset 6
+% committed changeset 7
+% committed changeset 8
+% committed changeset 9
+% committed changeset 10
+% committed changeset 11
+% committed changeset 12
+% committed changeset 13
+% committed changeset 14
+% committed changeset 15
+% committed changeset 16
+% committed changeset 17
+% committed changeset 18
+% committed changeset 19
+% committed changeset 20
+% committed changeset 21
+% committed changeset 22
+% committed changeset 23
+% committed changeset 24
+% committed changeset 25
+% committed changeset 26
+% committed changeset 27
+% committed changeset 28
+% committed changeset 29
+% committed changeset 30
+% committed changeset 31
+% log
+changeset:   31:58c80a7c8a40
+tag:         tip
+user:        test
+date:        Thu Jan 01 00:00:31 1970 +0000
+summary:     msg 31
+
+changeset:   30:ed2d2f24b11c
+user:        test
+date:        Thu Jan 01 00:00:30 1970 +0000
+summary:     msg 30
+
+changeset:   29:b5bd63375ab9
+user:        test
+date:        Thu Jan 01 00:00:29 1970 +0000
+summary:     msg 29
+
+changeset:   28:8e0c2264c8af
+user:        test
+date:        Thu Jan 01 00:00:28 1970 +0000
+summary:     msg 28
+
+changeset:   27:288867a866e9
+user:        test
+date:        Thu Jan 01 00:00:27 1970 +0000
+summary:     msg 27
+
+changeset:   26:3efc6fd51aeb
+user:        test
+date:        Thu Jan 01 00:00:26 1970 +0000
+summary:     msg 26
+
+changeset:   25:02a84173a97a
+user:        test
+date:        Thu Jan 01 00:00:25 1970 +0000
+summary:     msg 25
+
+changeset:   24:10e0acd3809e
+user:        test
+date:        Thu Jan 01 00:00:24 1970 +0000
+summary:     msg 24
+
+changeset:   23:5ec79163bff4
+user:        test
+date:        Thu Jan 01 00:00:23 1970 +0000
+summary:     msg 23
+
+changeset:   22:06c7993750ce
+user:        test
+date:        Thu Jan 01 00:00:22 1970 +0000
+summary:     msg 22
+
+changeset:   21:e5db6aa3fe2a
+user:        test
+date:        Thu Jan 01 00:00:21 1970 +0000
+summary:     msg 21
+
+changeset:   20:7128fb4fdbc9
+user:        test
+date:        Thu Jan 01 00:00:20 1970 +0000
+summary:     msg 20
+
+changeset:   19:52798545b482
+user:        test
+date:        Thu Jan 01 00:00:19 1970 +0000
+summary:     msg 19
+
+changeset:   18:86977a90077e
+user:        test
+date:        Thu Jan 01 00:00:18 1970 +0000
+summary:     msg 18
+
+changeset:   17:03515f4a9080
+user:        test
+date:        Thu Jan 01 00:00:17 1970 +0000
+summary:     msg 17
+
+changeset:   16:a2e6ea4973e9
+user:        test
+date:        Thu Jan 01 00:00:16 1970 +0000
+summary:     msg 16
+
+changeset:   15:e7fa0811edb0
+user:        test
+date:        Thu Jan 01 00:00:15 1970 +0000
+summary:     msg 15
+
+changeset:   14:ce8f0998e922
+user:        test
+date:        Thu Jan 01 00:00:14 1970 +0000
+summary:     msg 14
+
+changeset:   13:9d7d07bc967c
+user:        test
+date:        Thu Jan 01 00:00:13 1970 +0000
+summary:     msg 13
+
+changeset:   12:1941b52820a5
+user:        test
+date:        Thu Jan 01 00:00:12 1970 +0000
+summary:     msg 12
+
+changeset:   11:7b4cd9578619
+user:        test
+date:        Thu Jan 01 00:00:11 1970 +0000
+summary:     msg 11
+
+changeset:   10:7c5eff49a6b6
+user:        test
+date:        Thu Jan 01 00:00:10 1970 +0000
+summary:     msg 10
+
+changeset:   9:eb44510ef29a
+user:        test
+date:        Thu Jan 01 00:00:09 1970 +0000
+summary:     msg 9
+
+changeset:   8:453eb4dba229
+user:        test
+date:        Thu Jan 01 00:00:08 1970 +0000
+summary:     msg 8
+
+changeset:   7:03750880c6b5
+user:        test
+date:        Thu Jan 01 00:00:07 1970 +0000
+summary:     msg 7
+
+changeset:   6:a3d5c6fdf0d3
+user:        test
+date:        Thu Jan 01 00:00:06 1970 +0000
+summary:     msg 6
+
+changeset:   5:7874a09ea728
+user:        test
+date:        Thu Jan 01 00:00:05 1970 +0000
+summary:     msg 5
+
+changeset:   4:9b2ba8336a65
+user:        test
+date:        Thu Jan 01 00:00:04 1970 +0000
+summary:     msg 4
+
+changeset:   3:b53bea5e2fcb
+user:        test
+date:        Thu Jan 01 00:00:03 1970 +0000
+summary:     msg 3
+
+changeset:   2:db07c04beaca
+user:        test
+date:        Thu Jan 01 00:00:02 1970 +0000
+summary:     msg 2
+
+changeset:   1:5cd978ea5149
+user:        test
+date:        Thu Jan 01 00:00:01 1970 +0000
+summary:     msg 1
+
+changeset:   0:b99c7b9c8e11
+user:        test
+date:        Thu Jan 01 00:00:00 1970 +0000
+summary:     msg 0
+
+% hg up -C
+0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+% bisect test
+Testing changeset 16:a2e6ea4973e9 (30 changesets remaining, ~4 tests)
+1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+Testing changeset 23:5ec79163bff4 (15 changesets remaining, ~3 tests)
+1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+Testing changeset 27:288867a866e9 (8 changesets remaining, ~3 tests)
+1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+Testing changeset 29:b5bd63375ab9 (4 changesets remaining, ~2 tests)
+1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+Testing changeset 28:8e0c2264c8af (2 changesets remaining, ~1 tests)
+1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+The first bad revision is:
+changeset:   29:b5bd63375ab9
+user:        test
+date:        Thu Jan 01 00:00:29 1970 +0000
+summary:     msg 29
+