diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c37b0f294..a1af5a648 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,42 +18,34 @@ jobs:
             image: ubuntu-20.04
             options: "-release_64"
             asm: "-asm"
-            artifact_name: "libebm_ubuntu_release_64"
           - name: linux_debug_64
             image: ubuntu-20.04
             options: "-debug_64"
             asm: ""
-            artifact_name: "libebm_ubuntu_debug_64"
           - name: mac_release_64
             image: macos-13  # macos-13 is an intel based mac
             options: "-release_64"
             asm: "-asm"
-            artifact_name: "libebm_mac_release_64"
           - name: mac_debug_64
             image: macos-13  # macos-13 is an intel based mac
             options: "-debug_64"
             asm: ""
-            artifact_name: "libebm_mac_debug_64"
           - name: mac_release_arm
             image: macos-14  # macos-14 is an ARM based mac
             options: "-release_arm"
             asm: "-asm"
-            artifact_name: "libebm_mac_release_arm"
           - name: mac_debug_arm
             image: macos-14  # macos-14 is an ARM based mac
             options: "-debug_arm"
             asm: ""
-            artifact_name: "libebm_mac_debug_arm"
           - name: win_release_64
             image: windows-2022
             options: "-release_64"
             asm: ""
-            artifact_name: "libebm_win_release_64"
           - name: win_debug_64
             image: windows-2022
             options: "-debug_64"
             asm: ""
-            artifact_name: "libebm_win_debug_64"
     runs-on: ${{ matrix.image }}
     steps:
       - name: Check out repo
@@ -76,13 +68,13 @@ jobs:
       - name: Publish shared library
         uses: actions/upload-artifact@v4
         with:
-          name: ${{ matrix.artifact_name }}
+          name: libebm_${{ matrix.name }}
           path: bld/lib
       - name: Publish assembly
         if: ${{ matrix.asm != '' }}
         uses: actions/upload-artifact@v4
         with:
-          name: asm-${{ matrix.artifact_name }}
+          name: asm_${{ matrix.name }}
           path: bld/asm/
 
   vis:
@@ -203,66 +195,66 @@ jobs:
         include:
           - name: linux_release_64
             image: ubuntu-latest
-            options: "-release_64 -existing_release_64"
+            options: "-release_64"
+            existing: "-existing_release_64"
             scheduled: "-valgrind"
-            artifact_name: "libebm_ubuntu_release_64"
           - name: linux_debug_64
             image: ubuntu-latest
-            options: "-debug_64 -existing_debug_64"
+            options: "-debug_64"
+            existing: "-existing_debug_64"
             scheduled: "-valgrind"
-            artifact_name: "libebm_ubuntu_debug_64"
           - name: linux_release_32
             image: ubuntu-latest
             options: "-release_32"
+            existing: ""
             scheduled: "-valgrind"
-            artifact_name: ""
           - name: linux_debug_32
             image: ubuntu-latest
             options: "-debug_32"
+            existing: ""
             scheduled: "-valgrind"
-            artifact_name: ""
           - name: mac_release_64
             image: macos-13  # macos-13 is an intel based mac
-            options: "-release_64 -existing_release_64"
+            options: "-release_64"
+            existing: "-existing_release_64"
             scheduled: ""
-            artifact_name: "libebm_mac_release_64"
           - name: mac_debug_64
             image: macos-13  # macos-13 is an intel based mac
             # don't use the existing debug library since we want to rebuild with asan
             options: "-debug_64 -asan"
+            existing: ""
             scheduled: ""
-            artifact_name: ""
           - name: mac_release_arm
             image: macos-latest
-            options: "-release_arm -existing_release_arm"
+            options: "-release_arm"
+            existing: "-existing_release_arm"
             scheduled: ""
-            artifact_name: "libebm_mac_release_arm"
           - name: mac_debug_arm
             image: macos-latest
             # don't use the existing debug library since we want to rebuild with asan
             options: "-debug_arm -asan"
+            existing: ""
             scheduled: ""
-            artifact_name: ""
           - name: win_release_64
             image: windows-latest
-            options: "-release_64 -existing_release_64"
+            options: "-release_64"
+            existing: "-existing_release_64"
             scheduled: "-analysis"
-            artifact_name: "libebm_win_release_64"
           - name: win_debug_64
             image: windows-latest
-            options: "-debug_64 -existing_debug_64"
+            options: "-debug_64"
+            existing: "-existing_debug_64"
             scheduled: ""
-            artifact_name: "libebm_win_debug_64"
           - name: win_release_32
             image: windows-latest
             options: "-release_32"
+            existing: ""
             scheduled: "-analysis"
-            artifact_name: ""
           - name: win_debug_32
             image: windows-latest
             options: "-debug_32"
+            existing: ""
             scheduled: ""
-            artifact_name: ""
     runs-on: ${{ matrix.image }}
     steps:
       - name: Check out repo
@@ -272,30 +264,30 @@ jobs:
         with:
           python-version: 3.9
       - name: Download libebm artifact
-        if: ${{ matrix.artifact_name != '' }}
+        if: ${{ matrix.existing != '' }}
         uses: actions/download-artifact@v4
         with:
-          name: ${{ matrix.artifact_name }}
+          name: libebm_${{ matrix.name }}
           path: bld/lib
       - name: mac test_native
         if: ${{ startsWith(matrix.image, 'macos') }}
         run: |
-          /bin/sh ./shared/libebm/tests/libebm_test.sh ${{ matrix.options }}
+          /bin/sh ./shared/libebm/tests/libebm_test.sh ${{ matrix.options }} ${{ matrix.existing }}
       - name: linux test_native (CI)
         if: ${{ startsWith(matrix.image, 'ubuntu') && github.event_name != 'schedule' }}
         run: |
-          /bin/sh ./shared/libebm/tests/libebm_test.sh ${{ matrix.options }}
+          /bin/sh ./shared/libebm/tests/libebm_test.sh ${{ matrix.options }} ${{ matrix.existing }}
       - name: linux test_native (Schedule)
         if: ${{ startsWith(matrix.image, 'ubuntu') && github.event_name == 'schedule' }}
         run: |
-          /bin/sh ./shared/libebm/tests/libebm_test.sh ${{ matrix.options }} ${{ matrix.scheduled }}
+          /bin/sh ./shared/libebm/tests/libebm_test.sh ${{ matrix.options }} ${{ matrix.existing }} ${{ matrix.scheduled }}
       - name: win test_native (CI)
         if: ${{ startsWith(matrix.image, 'windows') && github.event_name != 'schedule' }}
         run: |
           $env:PATH += ';C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin'
-          .\shared\libebm\tests\libebm_test.bat ${{ matrix.options }}
+          .\shared\libebm\tests\libebm_test.bat ${{ matrix.options }} ${{ matrix.existing }}
       - name: win test_native (Schedule)
         if: ${{ startsWith(matrix.image, 'windows') && github.event_name == 'schedule' }}
         run: |
           $env:PATH += ';C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin'
-          .\shared\libebm\tests\libebm_test.bat ${{ matrix.options }} ${{ matrix.scheduled }}
+          .\shared\libebm\tests\libebm_test.bat ${{ matrix.options }} ${{ matrix.existing }} ${{ matrix.scheduled }}