--- a/.github/workflows/try-runtime.yml
+++ b/.github/workflows/try-runtime.yml
@@ -7,24 +7,48 @@
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
+  prepare-execution-marix:
+
+    name: Prepare execution matrix
+
+    runs-on: self-hosted-ci
+    outputs:
+      matrix: ${{ steps.create_matrix.outputs.matrix }}
+
+    steps:
+
+      - name: Clean Workspace
+        uses: AutoModality/action-clean@v1.1.0
+
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ github.head_ref }}  #Checking out head commit
+
+      - name: Read .env file
+        uses: xom9ikk/dotenv@v2
+
+      - name: Create Execution matrix
+        uses: CertainLach/create-matrix-action@v3
+        id: create_matrix
+        with:
+          matrix: |
+            network {opal}, replica_from_address {${{ env.OPAL_REPLICA_FROM }}}
+            network {quartz}, replica_from_address {${{ env.QUARTZ_REPLICA_FROM }}}
+            network {unique}, replica_from_address {${{ env.UNIQUE_REPLICA_FROM }}}
+
   try-runtime:
+    needs: prepare-execution-marix
+
     # The type of runner that the job will run on
-    runs-on: self-hosted-ci
-    
-    name: ${{ matrix.network }}-try-runtime
-
+    runs-on: [self-hosted-ci]
     continue-on-error: true         #Do not stop testing of matrix runs failed.  As it decided during PR review - it required 50/50& Let's check it with false.
 
+    name: ${{ matrix.network }}-try-runtime
     strategy:
       matrix:
-        include:
-          - network: opal
-            replica_from_address: wss://eu-ws-opal.unique.network:443
-          - network: quartz
-            replica_from_address: wss://eu-ws-quartz.unique.network:443
-          - network: unique
-            replica_from_address: wss://eu-ws.unique.network:443
-
+        include: ${{fromJson(needs.execution-marix.outputs.matrix)}}
+  
     steps:
 
       - name: Clean Workspace