diff --git a/.github/workflows/AddITensorRegistry.yml b/.github/workflows/AddITensorRegistry.yml
new file mode 100644
index 0000000..08c59d2
--- /dev/null
+++ b/.github/workflows/AddITensorRegistry.yml
@@ -0,0 +1,14 @@
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v2
+        with:
+          version: "1"
+      - uses: julia-actions/cache@v2
+      - uses: julia-actions/add-julia-registry@v2
+        with:
+          registry: ITensor/ITensorRegistry
+          ssh-key: ${{ secrets.DOCUMENTER_KEY }}
+      - uses: julia-actions/julia-runtest@v1
diff --git a/.github/workflows/CompatHelper.yml b/.github/workflows/CompatHelper.yml
index cba9134..683c6a6 100644
--- a/.github/workflows/CompatHelper.yml
+++ b/.github/workflows/CompatHelper.yml
@@ -13,4 +13,4 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           COMPATHELPER_PRIV: ${{ secrets.DOCUMENTER_KEY }}
-        run: julia -e 'using CompatHelper; CompatHelper.main()'
+        run: julia -e 'using CompatHelper; CompatHelper.main(; use_existing_registries=true)'
diff --git a/templates/github/.github/workflows/AddITensorRegistry.yml b/templates/github/.github/workflows/AddITensorRegistry.yml
new file mode 100644
index 0000000..08c59d2
--- /dev/null
+++ b/templates/github/.github/workflows/AddITensorRegistry.yml
@@ -0,0 +1,14 @@
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v2
+        with:
+          version: "1"
+      - uses: julia-actions/cache@v2
+      - uses: julia-actions/add-julia-registry@v2
+        with:
+          registry: ITensor/ITensorRegistry
+          ssh-key: ${{ secrets.DOCUMENTER_KEY }}
+      - uses: julia-actions/julia-runtest@v1
diff --git a/templates/github/.github/workflows/CompatHelper.yml b/templates/github/.github/workflows/CompatHelper.yml
index cba9134..683c6a6 100644
--- a/templates/github/.github/workflows/CompatHelper.yml
+++ b/templates/github/.github/workflows/CompatHelper.yml
@@ -13,4 +13,4 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           COMPATHELPER_PRIV: ${{ secrets.DOCUMENTER_KEY }}
-        run: julia -e 'using CompatHelper; CompatHelper.main()'
+        run: julia -e 'using CompatHelper; CompatHelper.main(; use_existing_registries=true)'