diff --git a/hgext/rebase.py b/hgext/rebase.py
--- a/hgext/rebase.py
+++ b/hgext/rebase.py
@@ -15,7 +15,7 @@ http://mercurial.selenic.com/wiki/Rebase
 '''
 
 from mercurial import hg, util, repair, merge, cmdutil, commands, bookmarks
-from mercurial import extensions, patch, scmutil, phases, obsolete
+from mercurial import extensions, patch, scmutil, phases, obsolete, error
 from mercurial.commands import templateopts
 from mercurial.node import nullrev
 from mercurial.lock import release
@@ -269,8 +269,9 @@ def rebase(ui, repo, **opts):
                         ui.setconfig('ui', 'forcemerge', opts.get('tool', ''))
                         stats = rebasenode(repo, rev, p1, state, collapsef)
                         if stats and stats[3] > 0:
-                            raise util.Abort(_('unresolved conflicts (see hg '
-                                        'resolve, then hg rebase --continue)'))
+                            raise error.InterventionRequired(
+                                _('unresolved conflicts (see hg '
+                                  'resolve, then hg rebase --continue)'))
                     finally:
                         ui.setconfig('ui', 'forcemerge', '')
                 cmdutil.duplicatecopies(repo, rev, target)
diff --git a/tests/test-rebase-abort.t b/tests/test-rebase-abort.t
--- a/tests/test-rebase-abort.t
+++ b/tests/test-rebase-abort.t
@@ -55,7 +55,7 @@ Conflicting rebase:
   merging common
   warning: conflicts during merge.
   merging common incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
 Abort:
@@ -126,7 +126,7 @@ Rebase and abort without generating new 
   merging c
   warning: conflicts during merge.
   merging c incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
   $ hg tglog
diff --git a/tests/test-rebase-bookmarks.t b/tests/test-rebase-bookmarks.t
--- a/tests/test-rebase-bookmarks.t
+++ b/tests/test-rebase-bookmarks.t
@@ -141,7 +141,7 @@ rebase --continue with bookmarks present
   merging c
   warning: conflicts during merge.
   merging c incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
   $ echo 'c' > c
   $ hg resolve --mark c
diff --git a/tests/test-rebase-check-restore.t b/tests/test-rebase-check-restore.t
--- a/tests/test-rebase-check-restore.t
+++ b/tests/test-rebase-check-restore.t
@@ -69,7 +69,7 @@ Rebasing B onto E - check keep: and phas
   merging A
   warning: conflicts during merge.
   merging A incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
 Solve the conflict and go on:
@@ -122,7 +122,7 @@ Rebase F onto E - check keepbranches:
   merging A
   warning: conflicts during merge.
   merging A incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
 Solve the conflict and go on:
diff --git a/tests/test-rebase-conflicts.t b/tests/test-rebase-conflicts.t
--- a/tests/test-rebase-conflicts.t
+++ b/tests/test-rebase-conflicts.t
@@ -65,7 +65,7 @@ Conflicting rebase:
   merging common
   warning: conflicts during merge.
   merging common incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
 Try to continue without solving the conflict:
diff --git a/tests/test-rebase-detach.t b/tests/test-rebase-detach.t
--- a/tests/test-rebase-detach.t
+++ b/tests/test-rebase-detach.t
@@ -372,7 +372,7 @@ Ensure --continue restores a correct sta
   merging H
   warning: conflicts during merge.
   merging H incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
   $ hg resolve --all -t internal:local
   $ hg rebase -c
diff --git a/tests/test-rebase-interruptions.t b/tests/test-rebase-interruptions.t
--- a/tests/test-rebase-interruptions.t
+++ b/tests/test-rebase-interruptions.t
@@ -61,7 +61,7 @@ Rebasing B onto E:
   merging A
   warning: conflicts during merge.
   merging A incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
 Force a commit on C during the interruption:
@@ -97,7 +97,7 @@ Resume the rebasing:
   merging A
   warning: conflicts during merge.
   merging A incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
 Solve the conflict and go on:
@@ -151,7 +151,7 @@ Rebasing B onto E:
   merging A
   warning: conflicts during merge.
   merging A incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
 Force a commit on B' during the interruption:
@@ -222,7 +222,7 @@ Rebasing B onto E:
   merging A
   warning: conflicts during merge.
   merging A incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
 Change phase on B and B'
diff --git a/tests/test-rebase-mq-skip.t b/tests/test-rebase-mq-skip.t
--- a/tests/test-rebase-mq-skip.t
+++ b/tests/test-rebase-mq-skip.t
@@ -108,7 +108,7 @@ already has one local mq patch
   $ hg up -q qtip
 
   $ HGMERGE=internal:fail hg rebase
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
   $ HGMERGE=internal:local hg resolve --all
diff --git a/tests/test-rebase-mq.t b/tests/test-rebase-mq.t
--- a/tests/test-rebase-mq.t
+++ b/tests/test-rebase-mq.t
@@ -63,7 +63,7 @@ Rebase - generate a conflict:
   merging f
   warning: conflicts during merge.
   merging f incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
 Fix the 1st conflict:
@@ -74,7 +74,7 @@ Fix the 1st conflict:
   merging f
   warning: conflicts during merge.
   merging f incomplete! (edit conflicts, then use 'hg resolve --mark')
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
 Fix the 2nd conflict:
diff --git a/tests/test-rebase-parameters.t b/tests/test-rebase-parameters.t
--- a/tests/test-rebase-parameters.t
+++ b/tests/test-rebase-parameters.t
@@ -416,7 +416,7 @@ Test --tool parameter:
   $ cd b3
 
   $ hg rebase -s 2 -d 1 --tool internal:fail
-  abort: unresolved conflicts (see hg resolve, then hg rebase --continue)
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
   [255]
 
   $ hg resolve -l