diff --git a/.github/workflows/run-nethermind-tests-with-code-coverage.yml b/.github/workflows/run-nethermind-tests-with-code-coverage.yml
index f3e00f8b9ae..caa37594451 100644
--- a/.github/workflows/run-nethermind-tests-with-code-coverage.yml
+++ b/.github/workflows/run-nethermind-tests-with-code-coverage.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-20.04]
     steps:
     - uses: actions/checkout@v2
       with: 
@@ -190,7 +190,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-20.04]
     steps:
     - uses: actions/checkout@v2
     - name: Setting up dotnet
diff --git a/.github/workflows/run-nethermind-tests.yml b/.github/workflows/run-nethermind-tests.yml
index 80c3ffadb1f..536758697da 100644
--- a/.github/workflows/run-nethermind-tests.yml
+++ b/.github/workflows/run-nethermind-tests.yml
@@ -17,7 +17,7 @@ env:
 jobs:
   neth-tests:
     name: Running Nethermind Tests 1
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v3
       with:
@@ -168,7 +168,7 @@ jobs:
 
   neth-tests5:
     name: Running Nethermind Tests 5
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v3
       with:
@@ -205,7 +205,7 @@ jobs:
 
   neth-tests6:
     name: Running Nethermind Tests 6
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v3
       with: