diff --git a/.travis.yml b/.travis.yml
index e26b0707cf..ecc69a0c16 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,6 +13,7 @@ cache:
 addons:
   apt:
     sources:
+    - kubuntu-backports
     - ubuntu-toolchain-r-test
     packages:
     - build-essential
diff --git a/Makefile b/Makefile
index a0dc23f705..bf399d19bf 100644
--- a/Makefile
+++ b/Makefile
@@ -220,7 +220,7 @@ qurtrun:
 # unit tests.
 .PHONY: tests
 tests:	generateuorbtopicheaders
-	$(Q) (mkdir -p $(PX4_BASE)/unittests/build && cd $(PX4_BASE)/unittests/build && cmake .. && $(MAKE) unittests)
+	$(Q) (mkdir -p $(PX4_BASE)/unittests/build && cd $(PX4_BASE)/unittests/build && cmake .. && $(MAKE) --no-print-directory unittests)
 
 .PHONY: format check_format
 check_format:
diff --git a/unittests/CMakeLists.txt b/unittests/CMakeLists.txt
index 80eb8c24e6..4285520b0c 100644
--- a/unittests/CMakeLists.txt
+++ b/unittests/CMakeLists.txt
@@ -11,6 +11,13 @@ CMAKE_FORCE_CXX_COMPILER( clang++ Clang )
 #set( CMAKE_FIND_ROOT_PATH_MODE_LIBARARY_ONLY )
 #set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE_ONLY )
 
+if("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang")
+  add_compile_options(-Qunused-arguments)
+endif()
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+  add_compile_options(-Qunused-arguments)
+endif()
+
 project(unittests)
 enable_testing()
 
@@ -123,8 +130,7 @@ add_executable(mixer_test mixer_test.cpp hrt.cpp
                           ${PX_SRC}/modules/systemlib/mixer/mixer_simple.cpp
                           ${PX_SRC}/modules/systemlib/pwm_limit/pwm_limit.c
                           ${PX_SRC}/systemcmds/tests/test_mixer.cpp)
-
-target_link_libraries( mixer_test LINK_PUBLIC px4_platform )
+target_link_libraries( mixer_test px4_platform )
 
                           
 add_gtest(mixer_test)
diff --git a/unittests/sbus2_test.cpp b/unittests/sbus2_test.cpp
index 1c32e3bf84..54c7fc412b 100644
--- a/unittests/sbus2_test.cpp
+++ b/unittests/sbus2_test.cpp
@@ -33,7 +33,7 @@ TEST(SBUS2Test, SBUS2)
 	// Init the parser
 	uint8_t frame[30];
 	unsigned partial_frame_count = 0;
-	uint16_t rc_values[18];
+	//uint16_t rc_values[18];
 	//uint16_t num_values;
 	//bool sbus_failsafe;
 	//bool sbus_frame_drop;
diff --git a/unittests/st24_test.cpp b/unittests/st24_test.cpp
index 42fa07ae74..c7fded68d4 100644
--- a/unittests/st24_test.cpp
+++ b/unittests/st24_test.cpp
@@ -41,7 +41,7 @@ TEST(ST24Test, ST24)
 		last_time = f;
 
 		// Pipe the data into the parser
-		hrt_abstime now = hrt_absolute_time();
+		//hrt_abstime now = hrt_absolute_time();
 
 		uint8_t rssi;
 		uint8_t rx_count;
@@ -53,8 +53,7 @@ TEST(ST24Test, ST24)
 			//warnx("decoded: %u channels (converted to PPM range)", (unsigned)channel_count);
 
 			for (unsigned i = 0; i < channel_count; i++) {
-
-				int16_t val = channels[i];
+				//int16_t val = channels[i];
 				//warnx("channel %u: %d 0x%03X", i, static_cast<int>(val), static_cast<int>(val));
 			}
 		}
diff --git a/unittests/sumd_test.cpp b/unittests/sumd_test.cpp
index bf99709475..65c944676c 100644
--- a/unittests/sumd_test.cpp
+++ b/unittests/sumd_test.cpp
@@ -41,7 +41,7 @@ TEST(SUMDTest, SUMD)
 		last_time = f;
 
 		// Pipe the data into the parser
-		hrt_abstime now = hrt_absolute_time();
+		//hrt_abstime now = hrt_absolute_time();
 
 		uint8_t rssi;
 		uint8_t rx_count;
@@ -53,8 +53,7 @@ TEST(SUMDTest, SUMD)
 			//warnx("decoded: %u channels (converted to PPM range)", (unsigned)channel_count);
 
 			for (unsigned i = 0; i < channel_count; i++) {
-
-				int16_t val = channels[i];
+				//int16_t val = channels[i];
 				//warnx("channel %u: %d 0x%03X", i, static_cast<int>(val), static_cast<int>(val));
 			}
 		}
diff --git a/unittests/uorb_unittests/uORBCommunicatorMock.hpp b/unittests/uorb_unittests/uORBCommunicatorMock.hpp
index 8c5b861b1e..acffbdb7ab 100644
--- a/unittests/uorb_unittests/uORBCommunicatorMock.hpp
+++ b/unittests/uorb_unittests/uORBCommunicatorMock.hpp
@@ -126,8 +126,8 @@ class uORB_test::uORBCommunicatorMock : public uORBCommunicator::IChannel
 
  private:
   uORBCommunicator::IChannelRxHandler* _rx_handler;
-  int _sub_topicA_copy_fd;
-  int _sub_topicB_copy_fd;
+  //int _sub_topicA_copy_fd;
+  //int _sub_topicB_copy_fd;
 
   std::map<std::string, std::string> _topic_translation_map;