diff --git a/.github/workflows/upstream pretest.yaml b/.github/workflows/upstream pretest.yaml
index 684a0133..987d5b47 100644
--- a/.github/workflows/upstream pretest.yaml	
+++ b/.github/workflows/upstream pretest.yaml	
@@ -10,7 +10,7 @@ permissions:
     contents: write
 
 jobs:
-    enmr_PRs:
+    enmr-PRs:
         runs-on: windows-latest
         outputs:
             exec_list: ${{ steps.make_exec_list.outputs.exec_list }}
@@ -20,7 +20,11 @@ jobs:
                 run: |
                 
                     git config --global core.autocrlf false
-                    git config --global --add url.https://github.com/.insteadOf "git@github.com:"
+                    # git config --global --add url.https://github.com/.insteadOf "git@github.com:"
+            
+            -   uses: webfactory/ssh-agent@v0.9.0
+                with:
+                    ssh-private-key: ${{ secrets.SSH_KEY }}
             
             -   name: checkout
                 uses: actions/checkout@main
@@ -37,49 +41,81 @@ jobs:
                     foreach ($subm_key in git config --file .gitmodules --name-only --get-regexp '^submodule\..+\.url$') {
                         $subm_url = git config --file .gitmodules --get $subm_key
                         
-                        #Write-Host "URL: $subm_url"
+                        # Write-Host "URL: $subm_url"
                         
+                        $pr_nums = @()
                         foreach ($ref_l in git ls-remote $subm_url 'refs/pull/*/merge') {
                             if ($ref_l -notmatch '^[0-9a-f]+\s+refs/pull/(\d+)/merge$') {
                                 throw "Unexpected format: $ref_l"
                             }
-                            
                             $pr_num = $Matches[1]
                             
-                            #Write-Host "- Found PR $pr_num"
+                            # Write-Host "- Found PR $pr_num"
                             
+                            $pr_nums += $pr_num
                             $exec_list += "$pr_num;$subm_url"
                         }
                         
+                        $subm_fork_url = $subm_url -replace 'KhronosGroup','SunSerega'
+                        if ($subm_fork_url -eq $subm_url) {
+                            throw "Cannot form fork URL from: $subm_url"
+                        }
+                        $fork_dir = './fork'
+                        New-Item -ItemType Directory -Path $fork_dir | Out-Null
+                        Push-Location $fork_dir
+                        git init --bare
+                        git remote add fork $subm_fork_url
+                        foreach ($ref_l in git ls-remote $subm_fork_url 'refs/heads/pretest/*') {
+                            if ($ref_l -notmatch '^[0-9a-f]+\s+refs/heads/pretest/(.+)$') {
+                                throw "Unexpected format: $ref_l"
+                            }
+                            $pr_num = $Matches[1]
+                            if ($pr_nums -contains $pr_num) { continue }
+                            
+                            Write-Host "pretest branch for PR $pr_num is no longer needed"
+                            git push fork --delete "pretest/$pr_num"
+                            
+                        }
+                        Pop-Location
+                        Remove-Item -Recurse $fork_dir
+                        
                     }
                     
                     $json = $exec_list | ConvertTo-Json -Compress
-                    Write-Host $json
+                    # Write-Host $json
                     echo "exec_list=$json" >> $env:GITHUB_OUTPUT
             
     pretest-each:
         runs-on: windows-latest
-        needs: enmr_PRs
+        needs: enmr-PRs
         strategy:
             fail-fast: false
             matrix:
-                exec_node: ${{ fromJson(needs.enmr_PRs.outputs.exec_list) }}
+                exec_node: ${{ fromJson(needs.enmr-PRs.outputs.exec_list) }}
         
         steps:
             -   name: git config
+                run: |
+                
+                    git config --global core.autocrlf false
+                    git config --global user.name "sun pack bot"
+                    git config --global user.email "sunserega2@gmail.com"
+                    # git config --global --add url.https://github.com/.insteadOf "git@github.com:"
+            
+            -   uses: webfactory/ssh-agent@v0.9.0
+                with:
+                    ssh-private-key: ${{ secrets.SSH_KEY }}
+            
+            -   name: checkout
+                uses: actions/checkout@main
+            
+            -   name: pretest
                 run: |
                 
                     $exec_node = "${{ matrix.exec_node }}"
                     $pr_num, $subm_url = $exec_node -split ';', 2
                     
-                    Write-Host "Testing PR#$pr_num from: $subm_url"
+                    # Write-Host "Testing PR $pr_num from: $subm_url"
                     
-                    # git config --global core.autocrlf false
-                    # git config --global user.name "sun pack bot"
-                    # git config --global user.email "sunserega2@gmail.com"
-            
-            # -   name: checkout
-                # uses: actions/checkout@main
-                # with:
-                    # token: ${{ secrets.PAT_TOKEN }}
+                    # aaaaa
             
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