diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index b479b46e4c..65b6892516 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -166,7 +166,7 @@ jobs:
           - name: 'openssl -O3 libssh valgrind'
             install_packages: zlib1g-dev libssh-dev valgrind
             CFLAGS: -O3
-            generate: -DENABLE_DEBUG=ON -DCURL_USE_LIBSSH=ON
+            generate: -DENABLE_DEBUG=ON -DCURL_USE_LIBSSH=ON -DCMAKE_UNITY_BUILD_BATCH_SIZE=30
 
           - name: 'openssl clang krb5 openldap static'
             install_steps: openldap-static