diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index caa52a4..27ced21 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -40,7 +40,7 @@ jobs:
     - name: Test
       env:
         GOPATH: /home/runner/work/git2go
-      run: make test-static
+      run: make TEST_ARGS=-test.v test-static
 
   build-static:
     strategy:
@@ -64,7 +64,7 @@ jobs:
         git submodule update --init
         make build-libgit2-static
     - name: Test
-      run:  make test-static
+      run:  make TEST_ARGS=-test.v test-static
 
   build-dynamic:
     strategy:
@@ -86,7 +86,7 @@ jobs:
         git submodule update --init
         make build-libgit2-dynamic
     - name: Test
-      run: make test-dynamic
+      run: make TEST_ARGS=-test.v test-dynamic
 
   build-system-dynamic:
     strategy:
@@ -108,7 +108,7 @@ jobs:
         git submodule update --init
         sudo ./script/build-libgit2.sh --dynamic --system
     - name: Test
-      run: make test
+      run: make TEST_ARGS=-test.v test
 
   build-system-static:
     strategy:
diff --git a/Makefile b/Makefile
index 182c53e..84262f4 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+TEST_ARGS ?= --count=1
+
 default: test
 
 # System library
@@ -5,7 +7,7 @@ default: test
 # This uses whatever version of libgit2 can be found in the system.
 test:
 	go run script/check-MakeGitError-thread-lock.go
-	go test --count=1 ./...
+	go test $(TEST_ARGS) ./...
 
 install:
 	go install ./...
@@ -28,7 +30,7 @@ test-dynamic: dynamic-build/install/lib/libgit2.so
 			go run script/check-MakeGitError-thread-lock.go
 	PKG_CONFIG_PATH=dynamic-build/install/lib/pkgconfig \
 			LD_LIBRARY_PATH=dynamic-build/install/lib \
-			go test --count=1 ./...
+			go test $(TEST_ARGS) ./...
 
 install-dynamic: dynamic-build/install/lib/libgit2.so
 	PKG_CONFIG_PATH=dynamic-build/install/lib/pkgconfig \
@@ -47,7 +49,7 @@ static-build/install/lib/libgit2.a:
 
 test-static: static-build/install/lib/libgit2.a
 	go run script/check-MakeGitError-thread-lock.go
-	go test --count=1 --tags "static" ./...
+	go test --tags "static" $(TEST_ARGS) ./...
 
 install-static: static-build/install/lib/libgit2.a
 	go install --tags "static" ./...
diff --git a/script/build-libgit2.sh b/script/build-libgit2.sh
index c649836..36e11e5 100755
--- a/script/build-libgit2.sh
+++ b/script/build-libgit2.sh
@@ -64,4 +64,9 @@ cmake -DTHREADSAFE=ON \
       -DDEPRECATE_HARD=ON \
       "${VENDORED_PATH}" &&
 
+if which gmake nproc >/dev/null && [ -f Makefile ]; then
+	# Make the build parallel if gmake is available and cmake used Makefiles.
+	exec gmake "-j$(nproc --all)" install
+fi
+
 exec cmake --build . --target install