diff --git a/.github/workflows/zfs-tests-functional.yml b/.github/workflows/zfs-tests-functional.yml
index 236bf599f6..69ca539b7b 100644
--- a/.github/workflows/zfs-tests-functional.yml
+++ b/.github/workflows/zfs-tests-functional.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [18.04, 20.04, 22.04]
+        os: [20.04, 22.04]
     runs-on: ubuntu-${{ matrix.os }}
     steps:
     - uses: actions/checkout@v3
@@ -22,9 +22,6 @@ jobs:
       run: |
         sudo apt-get update
         sudo apt-get -qq upgrade
-        if [ "${{ matrix.os }}" = "18.04" ]; then
-          sed -i.bak 's/rng-tools-debian/rng-tools/' ${{ github.workspace }}/.github/workflows/build-dependencies.txt
-        fi
         sudo xargs --arg-file=${{ github.workspace }}/.github/workflows/build-dependencies.txt apt-get install -qq
         sudo apt-get clean
     - name: Autogen.sh