diff --git a/azure-pipelines/templates/default.yml b/azure-pipelines/templates/default.yml
index d30060dceee..efb1e8f484b 100644
--- a/azure-pipelines/templates/default.yml
+++ b/azure-pipelines/templates/default.yml
@@ -2,22 +2,33 @@
 # http://tardis-sn.github.io/tardis/development/continuous_integration.html
 
 parameters:
-  - name: fetchDepth
-    type: number
-    default: 0
-
-  - name: fetchRefdata
+  - name: useMamba
     type: boolean
     default: false
 
-  - name: useMamba
+  - name: tardisEnv
+    type: boolean
+    default: true
+
+  - name: carsusEnv
     type: boolean
     default: false
 
-  - name: skipInstall
+  - name: fetchRefdata
     type: boolean
     default: false
 
+  - name: refdataRepo
+    type: string
+    default: azure
+    values:
+      - azure
+      - github
+
+  - name: fetchDepth
+    type: number
+    default: 0
+
 steps:
   - bash: echo "##vso[task.setvariable variable=shellopts]errexit"
     displayName: 'Force BASH exit on error'
@@ -25,6 +36,7 @@ steps:
 
   - bash: |
       echo "##vso[task.setvariable variable=tardis.dir]$(Build.SourcesDirectory)/tardis"
+      echo "##vso[task.setvariable variable=carsus.dir]$(Build.SourcesDirectory)/carsus"
       echo "##vso[task.setvariable variable=refdata.dir]$(Build.SourcesDirectory)/tardis-refdata"
     displayName: 'Set environment variables'
 
@@ -38,14 +50,24 @@ steps:
         echo "##vso[task.setvariable variable=package.manager]mamba"
       displayName: 'Set package manager'
  
-  - checkout: self
-    path: s/tardis
-    fetchDepth: ${{ parameters.fetchDepth }}
+  - ${{ if eq(parameters.tardisEnv, true) }}:
+    - checkout: self
+      path: s/tardis
+      fetchDepth: ${{ parameters.fetchDepth }}
+
+    - ${{ if and(eq(parameters.fetchRefdata, true), eq(parameters.refdataRepo, 'azure')) }}:
+      - checkout: git://TARDIS/tardis-refdata
+        lfs: true
+        displayName: 'Fetch reference data'
+
+    - ${{ if and(eq(parameters.fetchRefdata, true), eq(parameters.refdataRepo, 'github')) }}:
+      - bash: |
+          git clone https://github.com/tardis-sn/tardis-refdata.git $(refdata.dir)
+          cd $(refdata.dir); git lfs fetch
 
-  - ${{ if eq(parameters.fetchRefdata, true) }}:
-    - checkout: git://TARDIS/tardis-refdata
-      lfs: true
-      displayName: 'Fetch reference data'
+  - ${{ if eq(parameters.carsusEnv, true) }}:
+    - checkout: git://Carsus/carsus
+      path: s/carsus
 
   - bash: echo "##vso[task.prependpath]$CONDA/bin"
     displayName: 'Add conda to PATH'
@@ -58,15 +80,28 @@ steps:
     - bash: conda install mamba -c conda-forge -y
       displayName: 'Install Mamba'
 
-  - ${{ if eq(parameters.skipInstall, false) }}:
+  - ${{ if eq(parameters.tardisEnv, true) }}:
     - bash: |
         cd $(tardis.dir)
         $(package.manager) env create -f tardis_env3.yml
       displayName: 'Setup environment'
 
-  - ${{ if eq(parameters.skipInstall, false) }}:
+  - ${{ if eq(parameters.tardisEnv, true) }}:
     - bash: |
         cd $(tardis.dir)
         source activate tardis
         python setup.py install
       displayName: 'Install package'
+
+  - ${{ if eq(parameters.carsusEnv, true) }}:
+    - bash: |
+        cd $(carsus.dir)
+        $(package.manager) env create -f carsus_env3.yml
+      displayName: 'Setup environment (carsus)'
+
+  - ${{ if eq(parameters.carsusEnv, true) }}:
+    - bash: |
+        cd $(carsus.dir)
+        source activate carsus
+        python setup.py install
+      displayName: 'Install package (carsus)'