diff --git a/tests/test-convert-hg-source.t b/tests/test-convert-hg-source.t
--- a/tests/test-convert-hg-source.t
+++ b/tests/test-convert-hg-source.t
@@ -206,3 +206,22 @@
   a
   c
   d
+  $ cd ..
+
+  $ hg init commit-references
+  $ cd commit-references
+Create a commit we'll drop while converting so we get different hashes
+  $ echo a > unwanted
+  $ hg ci -Aqm 'unwanted'
+  $ echo a > a
+  $ hg ci -Aqm initial
+  $ echo b > b
+  $ hg ci -Aqm 'the previous commit was 3ccbd4cbba95'
+
+  $ cd ..
+  $ hg convert commit-references new-commit-references -q \
+  >     --config convert.hg.startrev=1
+  $ cd new-commit-references
+  $ hg log -T '{node|short} {desc}\n'
+  38a97fe212e7 the previous commit was 3cf70f7c1f3b
+  3cf70f7c1f3b initial