diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1e494fdd4..2776206c9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -106,7 +106,8 @@ jobs:
           git diff --exit-code
 
       - name: Test
-        run: go test -v -race ./...
+        # parallel testing is disabled because somehow parallel testing causes Github Actions to kill the runner.
+        run: go test -parallel=1 -v -race ./...
         env:
           PGX_TEST_DATABASE: ${{ matrix.pgx-test-database }}
           PGX_TEST_UNIX_SOCKET_CONN_STRING: ${{ matrix.pgx-test-unix-socket-conn-string }}
@@ -149,6 +150,7 @@ jobs:
         shell: bash
 
       - name: Test
-        run: go test -v -race  ./...
+        # parallel testing is disabled because somehow parallel testing causes Github Actions to kill the runner.
+        run: go test -parallel=1 -v -race  ./...
         env:
           PGX_TEST_DATABASE: ${{ steps.postgres.outputs.connection-uri }}