--- a/hgext3rd/evolve/evocommands.py	Sun Jul 23 07:33:36 2017 +0200
+++ b/hgext3rd/evolve/evocommands.py	Sun Jul 23 17:06:27 2017 +0200
@@ -812,7 +812,8 @@
         msg += ctx.description()
         opts['message'] = msg
         opts['edit'] = True
-        opts['user'] = ctx.user()
+        if not opts['user']:
+            opts['user'] = ctx.user()
         while haschanges():
             pats = ()
             cmdutil.dorecord(ui, repo, commands.commit, 'commit', False,

--- a/tests/test-split.t	Sun Jul 23 07:33:36 2017 +0200
+++ b/tests/test-split.t	Sun Jul 23 17:06:27 2017 +0200
@@ -270,7 +270,7 @@
   ~  date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     split1
   
-  $ hg split <<EOF
+  $ hg split --user victor <<EOF
   > y
   > y
   > n
@@ -297,17 +297,17 @@
   created new head
   Done splitting? [yN] y
   $ hg glog -r "14::"
-  @  changeset:   19:60ea019b0f8d
+  @  changeset:   19:452a26648478
   |  bookmark:    bookA
   |  bookmark:    bookB
   |  tag:         tip
-  |  user:        test
+  |  user:        victor
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     split6
   |
-  o  changeset:   18:2c7a2e53f23b
+  o  changeset:   18:1315679b77dc
   |  parent:      14:3f134f739075
-  |  user:        test
+  |  user:        victor
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     split5
   |
@@ -317,8 +317,8 @@
      summary:     split1
   
   $ hg book
-     bookA                     19:60ea019b0f8d
-   * bookB                     19:60ea019b0f8d
+     bookA                     19:452a26648478
+   * bookB                     19:452a26648478
  
 Lastest revision is selected if multiple are given to -r
   $ hg split -r "desc(_a)::"
@@ -401,7 +401,7 @@
   $ hg add babar celeste
   $ hg commit -m "Works on mytopic" babar celeste
   $ hg summary
-  parent: 21:615c369f47f0 tip
+  parent: 21:0a160c9fe1dd tip
    Works on mytopic
   branch: new-branch
   commit: 2 unknown (clean)
@@ -448,15 +448,15 @@
 Check that the topic is still here
 
   $ hg log -r "tip~1::"
-  changeset:   22:f879ab83f991
+  changeset:   22:addcf498f19e
   branch:      new-branch
   topic:       mytopic
-  parent:      20:89e64a2c68b3
+  parent:      20:fdb403258632
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     split7
   
-  changeset:   23:db75dbc1a3a6
+  changeset:   23:2532b288af61
   branch:      new-branch
   tag:         tip
   topic:       mytopic