diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index cdcff4d..e9c93d8 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,12 +7,12 @@ env:
   EXT_SECP256K1_CONFIGURE: "--with-secp256k1-config --with-module-recovery --with-module-ecdh --with-module-schnorrsig --with-module-extrakeys"
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
       - run: cd /tmp && git clone https://github.com/bitcoin-core/secp256k1.git libsecp256k1 && cd libsecp256k1 && git checkout efad3506a8937162e8010f5839fdf3771dfcf516 && ./autogen.sh && ./configure --enable-tests=no --enable-benchmark=no --enable-experimental --enable-module-ecdh --enable-module-recovery --enable-module-schnorrsig --enable-module-extrakeys && make -j$(nproc) && sudo make install
-      - run: cd secp256k1 && phpize && ./configure --with-secp256k1-config --with-module-recovery --with-module-ecdh --with-module-schnorrsig --with-module-extrakeys && make -j$(nproc) && sudo make install
+      - run: cd secp256k1 && php -v && phpize && ./configure --with-secp256k1-config --with-module-recovery --with-module-ecdh --with-module-schnorrsig --with-module-extrakeys && make -j$(nproc) && sudo make install
       - run: composer update
       - run: travis/verify_stubs.sh
       - run: cd secp256k1/ && REPORT_EXIT_STATUS=1 make test || (find tests/*.log -type f -exec cat {} + ; exit 1) && cd ..