diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index 423ff4e9..29ca6fca 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -57,7 +57,7 @@ jobs:
                     tools/dev/v8gen.py -vv x64.release -- is_component_build=true use_custom_libcxx=false treat_warnings_as_errors=false
 
                     # Build
-                    ninja -C out.gn/x64.release/
+                    ninja -j4 -C out.gn/x64.release/
 
                     # Install to /opt/v8/self-built
                     sudo mkdir -p /opt/v8/self-built/{lib,include}
@@ -122,7 +122,7 @@ jobs:
                 run: |
                     phpize
                     ./configure --with-v8js=/opt/v8/self-built LDFLAGS="-lstdc++" CPPFLAGS="-DV8_COMPRESS_POINTERS -DV8_ENABLE_SANDBOX"
-                    make
+                    make -j4
                     make test
 
             -   name: Archive test results
@@ -154,7 +154,7 @@ jobs:
                 run: |
                     phpize
                     ./configure
-                    make
+                    make -j4
                     make test
                 shell: alpine.sh {0}
 
@@ -198,7 +198,7 @@ jobs:
                 run: |
                     phpize
                     ./configure --with-v8js=/opt/homebrew CPPFLAGS="-DV8_COMPRESS_POINTERS -DV8_ENABLE_SANDBOX"
-                    make
+                    make -j4
                     make test
 
             -   name: Archive test results