diff --git a/.github/workflows/test-client.yml b/.github/workflows/test-client.yml
index 260885b983f..d6703aea8a1 100644
--- a/.github/workflows/test-client.yml
+++ b/.github/workflows/test-client.yml
@@ -48,6 +48,8 @@ jobs:
       matrix:
         os: [ ubuntu-22.04, macos-12, windows-latest ]
     runs-on: ${{ matrix.os }}
+    env:
+      CTX_AGGREGATOR_CAPABILITY: false
     steps:
       - name: Checkout sources
         uses: actions/checkout@v3
@@ -69,6 +71,10 @@ jobs:
           echo "NETWORK=${{ inputs.network }}" >> $GITHUB_ENV
           echo "AGGREGATOR_ENDPOINT=${{ inputs.aggregator_endpoint }}" >> $GITHUB_ENV
           echo "GENESIS_VERIFICATION_KEY=$(curl -s ${{ inputs.genesis_verification_key }})" >> $GITHUB_ENV
+          echo "TRANSACTIONS_HASHES_TO_CERTIFY=${{ inputs.transactions_hashes_to_certify }}" >> $GITHUB_ENV
+          
+          CTX_AGGREGATOR_CAPABILITY=$(wget -q -O - https://aggregator.testing-sanchonet.api.mithril.network/aggregator | jq '.capabilities.signed_entity_types | contains(["CardanoTransactions"])')
+          echo "CTX_AGGREGATOR_CAPABILITY => $CTX_AGGREGATOR_CAPABILITY"
           
       - name: Checkout binary
         uses: dawidd6/action-download-artifact@v2
@@ -114,6 +120,12 @@ jobs:
         working-directory: ./bin
         run: ./mithril-client ${{ steps.prepare.outputs.debug_level }} mithril-stake-distribution download $MITHRIL_STAKE_DISTRIBUTION_HASH
 
+      - name: Cardano transaction certify
+        if: ${{ env.CTX_AGGREGATOR_CAPABILITY == 'true' }}
+        shell: bash
+        working-directory: ./bin
+        run: ./mithril-client ${{ steps.prepare.outputs.debug_level }} cardano-transaction certify $TRANSACTIONS_HASHES_TO_CERTIFY
+
   test-docker:
     strategy:
       fail-fast: false