diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b64432c..3564207 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -60,6 +60,13 @@ jobs:
             nginx-ref: stable-1.28
             build: debug
 
+    env:
+      testTarget: >-
+        ${{ (matrix.nginx-ref == 'stable-1.28' && matrix.build == 'debug')
+          && 'full-test'
+          || 'test'
+        }}
+
     runs-on: ${{ matrix.runner }}-latest
 
     steps:
@@ -73,8 +80,6 @@ jobs:
         with:
           repository: 'nginx/nginx-tests'
           path: 'nginx/tests'
-          sparse-checkout: |
-            lib
 
       - uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b
         with:
@@ -117,4 +122,4 @@ jobs:
       - name: run tests
         # always run if build succeeds
         if: ${{ !cancelled() && steps.build.outcome == 'success' }}
-        run: make BUILD=${{ matrix.build }} TEST_PREREQ= test
+        run: make BUILD=${{ matrix.build }} TEST_PREREQ= ${{ env.testTarget }}
diff --git a/Makefile b/Makefile
index e34dd1c..74dd2ce 100644
--- a/Makefile
+++ b/Makefile
@@ -99,7 +99,11 @@ unittest: $(NGINX_BUILD_DIR)/Makefile  ## Run unit-tests
 	$(BUILD_ENV) $(NGX_CARGO) test
 
 test: $(TEST_PREREQ) ## Run the integration test suite
-	env $(TEST_ENV) prove -I $(NGINX_TESTS_DIR)/lib --state=save $(TESTS) ||\
+	env $(TEST_ENV) prove -I $(NGINX_TESTS_DIR)/lib -v $(TESTS)
+
+full-test: $(TEST_PREREQ) ## Run the module and NGINX integration test suites
+	env $(TEST_ENV) prove -I $(NGINX_TESTS_DIR)/lib --state=save \
+		-j $(TEST_JOBS) $(TESTS) $(NGINX_TESTS_DIR) ||\
 	env $(TEST_ENV) prove -I $(NGINX_TESTS_DIR)/lib --state=failed -v
 
 clean: ## Cleanup everything
diff --git a/build/compat-gnu.mk b/build/compat-gnu.mk
index 2364e0f..bdf27ab 100644
--- a/build/compat-gnu.mk
+++ b/build/compat-gnu.mk
@@ -1,4 +1,5 @@
 HOST_TUPLE	:= $(shell $(NGX_CARGO) -vV | awk '/^host: / { print $$2; }')
+TEST_JOBS	:= $(shell nproc 2>/dev/null || getconf NPROCESSORS_ONLN 2>/dev/null || echo 1)
 
 # extension for Rust cdylib targets
 ifeq ($(shell uname), Darwin)
diff --git a/build/compat-posix.mk b/build/compat-posix.mk
index f3af3a6..4fec031 100644
--- a/build/compat-posix.mk
+++ b/build/compat-posix.mk
@@ -1,4 +1,5 @@
 HOST_TUPLE	!= $(NGX_CARGO) -vV | awk '/^host: / { print $$2; }'
+TEST_JOBS	!= nproc 2>/dev/null || getconf NPROCESSORS_ONLN 2>/dev/null || echo 1
 
 # bsd make compatibility
 CURDIR		?= $(.CURDIR)