diff --git a/josh-core/src/changes.rs b/josh-core/src/changes.rs
index a99e5ff9b..9c382e2a1 100644
--- a/josh-core/src/changes.rs
+++ b/josh-core/src/changes.rs
@@ -130,11 +130,7 @@ pub fn changes_to_refs(
                     change.commit
                 )));
             }
-        } else {
-            return Err(josh_error(&format!(
-                "rejecting to push {:?} without id",
-                change.commit
-            )));
+            seen.insert(id);
         }
     }
 
diff --git a/tests/proxy/push_stacked.t b/tests/proxy/push_stacked.t
index 901aa970c..4b73874b3 100644
--- a/tests/proxy/push_stacked.t
+++ b/tests/proxy/push_stacked.t
@@ -56,15 +56,15 @@
   $ git commit -m "add file3" 1> /dev/null
   $ git push -o author=josh@example.com origin master:refs/stack/for/master
   remote: josh-proxy: pre-receive hook        
-  remote: upstream: response status: 500 Internal Server Error        
+  remote: upstream: response status: 200 OK        
   remote: upstream: response body:        
   remote: 
-  remote: rejecting to push 3ad32b3bd3bb778441e7eae43930d8dc6293eddc without id        
-  remote: error: hook declined to update refs/stack/for/master        
+  remote: Everything up-to-date        
+  remote: Everything up-to-date        
+  remote: To http://localhost:8001/real_repo.git        
+  remote:    ec41aad..3ad32b3  master -> @heads/master/josh@example.com        
   To http://localhost:8002/real_repo.git
-   ! [remote rejected] master -> refs/stack/for/master (hook declined)
-  error: failed to push some refs to 'http://localhost:8002/real_repo.git'
-  [1]
+   * [new reference]   master -> refs/stack/for/master
   $ git push -o author=foo@example.com origin master:refs/stack/for/master
   remote: josh-proxy: pre-receive hook        
   remote: upstream: response status: 200 OK        
@@ -85,8 +85,8 @@
    * [new branch]      @heads/master/josh@example.com -> origin/@heads/master/josh@example.com
 
   $ git log --decorate --graph --pretty="%s %d"
-  * add file3  (HEAD -> master, origin/@heads/master/foo@example.com)
-  * Change-Id: foo7  (origin/@heads/master/josh@example.com, origin/@changes/master/josh@example.com/foo7)
+  * add file3  (HEAD -> master, origin/@heads/master/josh@example.com, origin/@heads/master/foo@example.com)
+  * Change-Id: foo7  (origin/@changes/master/josh@example.com/foo7)
   * Change-Id: 1234  (origin/@changes/master/josh@example.com/1234)
   * add file1  (origin/master, origin/HEAD)
 
@@ -119,7 +119,7 @@ get listed if they differ from HEAD
   3b0e3dbefd779ec54d92286047f32d3129161c0d\trefs/heads/@changes/master/josh@example.com/1234 (esc)
   ec41aad70b4b898baf48efeb795a7753d9674152\trefs/heads/@changes/master/josh@example.com/foo7 (esc)
   3ad32b3bd3bb778441e7eae43930d8dc6293eddc\trefs/heads/@heads/master/foo@example.com (esc)
-  ec41aad70b4b898baf48efeb795a7753d9674152\trefs/heads/@heads/master/josh@example.com (esc)
+  3ad32b3bd3bb778441e7eae43930d8dc6293eddc\trefs/heads/@heads/master/josh@example.com (esc)
   4950fa502f51b7bfda0d7975dbff9b0f9a9481ca\trefs/heads/master (esc)
 
   $ git ls-remote http://localhost:8002/real_repo.git:/sub1.git
diff --git a/tests/proxy/push_stacked_gerrit.t b/tests/proxy/push_stacked_gerrit.t
index 4f9ce8e2b..5291a202b 100644
--- a/tests/proxy/push_stacked_gerrit.t
+++ b/tests/proxy/push_stacked_gerrit.t
@@ -63,15 +63,17 @@
   $ git commit -m "add file3" 1> /dev/null
   $ git push -o author=josh@example.com origin master:refs/for/master
   remote: josh-proxy: pre-receive hook        
-  remote: upstream: response status: 500 Internal Server Error        
+  remote: upstream: response status: 200 OK        
   remote: upstream: response body:        
   remote: 
-  remote: rejecting to push 3ad32b3bd3bb778441e7eae43930d8dc6293eddc without id        
-  remote: error: hook declined to update refs/for/master        
+  remote: Everything up-to-date        
+  remote: Everything up-to-date        
+  remote: To http://localhost:8001/real_repo.git        
+  remote:    ec41aad..3ad32b3  JOSH_PUSH -> refs/for/master        
+  remote: To http://localhost:8001/real_repo.git        
+  remote:    ec41aad..3ad32b3  master -> @heads/master/josh@example.com        
   To http://localhost:8002/real_repo.git
-   ! [remote rejected] master -> refs/for/master (hook declined)
-  error: failed to push some refs to 'http://localhost:8002/real_repo.git'
-  [1]
+   * [new reference]   master -> refs/for/master
   $ git push http://localhost:8001/real_repo.git :refs/for/master
   To http://localhost:8001/real_repo.git
    - [deleted]         refs/for/master
@@ -97,8 +99,8 @@
    * [new branch]      @heads/master/josh@example.com -> origin/@heads/master/josh@example.com
 
   $ git log --decorate --graph --pretty="%s %d"
-  * add file3  (HEAD -> master, origin/@heads/master/foo@example.com)
-  * Change-Id: foo7  (origin/@heads/master/josh@example.com, origin/@changes/master/josh@example.com/foo7)
+  * add file3  (HEAD -> master, origin/@heads/master/josh@example.com, origin/@heads/master/foo@example.com)
+  * Change-Id: foo7  (origin/@changes/master/josh@example.com/foo7)
   * Change-Id: 1234  (origin/@changes/master/josh@example.com/1234)
   * add file1  (origin/master, origin/HEAD)
 
@@ -111,8 +113,8 @@
    * [new branch]      @heads/master/josh@example.com -> origin/@heads/master/josh@example.com
   $ git checkout -q @heads/master/foo@example.com
   $ git log --decorate --graph --pretty="%s %d"
-  * add file3  (HEAD -> @heads/master/foo@example.com, origin/@heads/master/foo@example.com)
-  * Change-Id: foo7  (origin/@heads/master/josh@example.com, origin/@changes/master/josh@example.com/foo7)
+  * add file3  (HEAD -> @heads/master/foo@example.com, origin/@heads/master/josh@example.com, origin/@heads/master/foo@example.com)
+  * Change-Id: foo7  (origin/@changes/master/josh@example.com/foo7)
   * Change-Id: 1234  (origin/@changes/master/josh@example.com/1234)
   * add file1  (origin/master, origin/HEAD, master)
 
diff --git a/tests/proxy/push_stacked_sub.t b/tests/proxy/push_stacked_sub.t
index 234aa3807..724b59983 100644
--- a/tests/proxy/push_stacked_sub.t
+++ b/tests/proxy/push_stacked_sub.t
@@ -73,15 +73,15 @@
   $ git commit -m "add file3" 1> /dev/null
   $ git push -o author=josh@example.com origin master:refs/stack/for/master
   remote: josh-proxy: pre-receive hook        
-  remote: upstream: response status: 500 Internal Server Error        
+  remote: upstream: response status: 200 OK        
   remote: upstream: response body:        
   remote: 
-  remote: rejecting to push a3065162ecee0fecc977ec04a275e10b5e15a39c without id        
-  remote: error: hook declined to update refs/stack/for/master        
+  remote: Everything up-to-date        
+  remote: Everything up-to-date        
+  remote: To http://localhost:8001/real_repo.git        
+  remote:    2bb9471..a306516  master -> @heads/master/josh@example.com        
   To http://localhost:8002/real_repo.git:/sub1.git
-   ! [remote rejected] master -> refs/stack/for/master (hook declined)
-  error: failed to push some refs to 'http://localhost:8002/real_repo.git:/sub1.git'
-  [1]
+   * [new reference]   master -> refs/stack/for/master
 
   $ curl -s http://localhost:8002/flush
   Flushed credential cache
@@ -94,8 +94,8 @@
    * [new branch]      @heads/master/josh@example.com -> origin/@heads/master/josh@example.com
    * [new branch]      @heads/other_branch/josh@example.com -> origin/@heads/other_branch/josh@example.com
   $ git log --decorate --graph --pretty="%s %d"
-  * add file3  (HEAD -> master)
-  * Change-Id: foo7  (origin/@heads/other_branch/josh@example.com, origin/@heads/master/josh@example.com, origin/@changes/other_branch/josh@example.com/foo7, origin/@changes/master/josh@example.com/foo7)
+  * add file3  (HEAD -> master, origin/@heads/master/josh@example.com)
+  * Change-Id: foo7  (origin/@heads/other_branch/josh@example.com, origin/@changes/other_branch/josh@example.com/foo7, origin/@changes/master/josh@example.com/foo7)
   * Change-Id: 1234  (origin/@changes/other_branch/josh@example.com/1234, origin/@changes/master/josh@example.com/1234)
   * add file1  (origin/master, origin/HEAD)
 
@@ -151,8 +151,12 @@ Make sure all temporary namespace got removed
   |   |   |   `-- 77ff51363c9825cc2a221fc0ba5a883a1a2c72
   |   |   |-- 6b
   |   |   |   `-- 46faacade805991bcaea19382c9d941828ce80
+  |   |   |-- 88
+  |   |   |   `-- 2b84c5d3241087bc41982a744b72b7a174c49e
   |   |   |-- a0
   |   |   |   `-- 24003ee1acc6bf70318a46e7b6df651b9dc246
+  |   |   |-- a3
+  |   |   |   `-- 065162ecee0fecc977ec04a275e10b5e15a39c
   |   |   |-- b2
   |   |   |   `-- ea883bc5df63565960a38cad7a57f73ac66eaa
   |   |   |-- ba
@@ -160,6 +164,8 @@ Make sure all temporary namespace got removed
   |   |   |   `-- c8af20b53d712874a32944874c66a21afa91f9
   |   |   |-- bb
   |   |   |   `-- 282e9cdc1b972fffd08fd21eead43bc0c83cb8
+  |   |   |-- be
+  |   |   |   `-- 33ab805ad4ef7ddda5b51e4a78ec0fac6b699a
   |   |   |-- c6
   |   |   |   `-- 27a2e3a6bfbb7307f522ad94fdfc8c20b92967
   |   |   |-- c8
@@ -233,7 +239,7 @@ Make sure all temporary namespace got removed
           |-- namespaces
           `-- tags
   
-  58 directories, 44 files
+  61 directories, 47 files
 
 $ cat ${TESTTMP}/josh-proxy.out
 $ cat ${TESTTMP}/josh-proxy.out | grep REPO_UPDATE