diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 168f5d2..4fc19d4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,4 +16,16 @@ jobs:
       - name: Build
         run: make dockerbuild && make docker
         working-directory: uvm32
+      - name: Code Coverage Report
+        uses: irongut/CodeCoverageSummary@v1.3.0
+        with:
+          filename: uvm32/test/coverage.xml
+          badge: true
+          fail_below_min: false
+          format: markdown
+          hide_branch_rate: false
+          hide_complexity: true
+          indicators: true
+          output: both
+          thresholds: '60 80'
 
diff --git a/Dockerfile b/Dockerfile
index fb7bb0d..9928149 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -35,3 +35,7 @@ RUN apt-get install -y qemu-system-misc
 
 # host-sdl
 RUN apt-get install -y libsdl3-0 libsdl3-dev
+
+# code coverage
+RUN apt-get install -y gcovr
+
diff --git a/Makefile b/Makefile
index b4f911c..4341c60 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,12 @@
 .PHONY: test
 
 all:
-	make -C test
+	(cd test && make clean)
 	(cd hosts && make)
 	(cd apps && make)
 
 clean:
-	make -C test clean
+	(cd test && make clean)
 	(cd hosts && make clean)
 	(cd apps && make clean)
 
diff --git a/test/Makefile b/test/Makefile
index ac178c9..4e16274 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -9,9 +9,17 @@ TESTS = \
 RUNCMD = $(foreach TEST,${TESTS},make -C ${TEST} &&)
 CLEANCMD = $(foreach TEST,${TESTS},make -C ${TEST} clean &&)
 
+ifeq (,$(shell which gcovr))
+	GCOVRCMD=echo Install gcovr for code coverage reports
+else
+    GCOVRCMD=gcovr -r ../ --filter ".*uvm32.c" && gcovr -r ../ --filter ".*uvm32.c" --cobertura-pretty --cobertura coverage.xml
+endif
+
 all:
 	${RUNCMD} true
+	${GCOVRCMD}
 
 clean:
 	${CLEANCMD} true
+	rm -f coverage.xml
 
diff --git a/test/common/makefile.common b/test/common/makefile.common
index 715c70d..e7d35aa 100644
--- a/test/common/makefile.common
+++ b/test/common/makefile.common
@@ -7,8 +7,8 @@ UVM32_MEMORY_SIZE ?= 16384
 CFLAGS +=-std=c99
 CFLAGS += -Wall
 CFLAGS += -Werror
-
 CFLAGS += -DUVM32_MEMORY_SIZE=${UVM32_MEMORY_SIZE}
+CFLAGS += -fprofile-arcs -ftest-coverage
 
 SUITE_NAME=tests
 
@@ -31,6 +31,6 @@ test/test_runners/${SUITE_NAME}_Runner.c: test/${SUITE_NAME}.c
 	@ruby $(UNITY_ROOT)/auto/generate_test_runner.rb test/${SUITE_NAME}.c  test/test_runners/${SUITE_NAME}_Runner.c
 
 clean:
-	rm -rf $(TARGET1) test/test_runners
+	rm -rf $(TARGET1) test/test_runners *.gcno *.gcda *.gcov
 	(cd rom && make clean)