diff --git a/test/test_audio.cpp b/test/test_audio.cpp
index 1bd18b3..4943223 100644
--- a/test/test_audio.cpp
+++ b/test/test_audio.cpp
@@ -73,7 +73,7 @@ void synth_run_float(synth_state* synth, float* audiobuffer, long nframes)
   }
 }
 
-long data_cb_float(cubeb_stream *stream, void *user, const void * inputbuffer, void *outputbuffer, long nframes)
+long data_cb_float(cubeb_stream * /*stream*/, void * user, const void * /*inputbuffer*/, void * outputbuffer, long nframes)
 {
   synth_state *synth = (synth_state *)user;
   synth_run_float(synth, (float*)outputbuffer, nframes);
@@ -92,14 +92,14 @@ void synth_run_16bit(synth_state* synth, short* audiobuffer, long nframes)
   }
 }
 
-long data_cb_short(cubeb_stream *stream, void *user, const void * inputbuffer, void *outputbuffer, long nframes)
+long data_cb_short(cubeb_stream * /*stream*/, void * user, const void * /*inputbuffer*/, void * outputbuffer, long nframes)
 {
   synth_state *synth = (synth_state *)user;
   synth_run_16bit(synth, (short*)outputbuffer, nframes);
   return nframes;
 }
 
-void state_cb(cubeb_stream *stream, void *user, cubeb_state state)
+void state_cb(cubeb_stream * /*stream*/, void * /*user*/, cubeb_state /*state*/)
 {
 }
 
@@ -280,7 +280,7 @@ void run_channel_rate_test()
 }
 
 
-int main(int argc, char *argv[])
+int main(int /*argc*/, char * /*argv*/[])
 {
 #ifdef CUBEB_GECKO_BUILD
   ScopedXPCOM xpcom("test_audio");
diff --git a/test/test_duplex.cpp b/test/test_duplex.cpp
index 85fbd3d..c5d02d7 100644
--- a/test/test_duplex.cpp
+++ b/test/test_duplex.cpp
@@ -38,7 +38,7 @@ struct user_state
 
 
 
-long data_cb(cubeb_stream *stream, void *user, const void * inputbuffer, void *outputbuffer, long nframes)
+long data_cb(cubeb_stream * stream, void * user, const void * inputbuffer, void * outputbuffer, long nframes)
 {
   user_state * u = reinterpret_cast<user_state*>(user);
 #if (defined(_WIN32) || defined(__WIN32__))
@@ -70,7 +70,7 @@ long data_cb(cubeb_stream *stream, void *user, const void * inputbuffer, void *o
   return nframes;
 }
 
-void state_cb(cubeb_stream *stream, void *user, cubeb_state state)
+void state_cb(cubeb_stream * stream, void * /*user*/, cubeb_state state)
 {
   if (stream == NULL)
     return;
@@ -89,7 +89,7 @@ void state_cb(cubeb_stream *stream, void *user, cubeb_state state)
   return;
 }
 
-int main(int argc, char *argv[])
+int main(int /*argc*/, char * /*argv*/[])
 {
 #ifdef CUBEB_GECKO_BUILD
   ScopedXPCOM xpcom("test_duplex");
diff --git a/test/test_latency.cpp b/test/test_latency.cpp
index 558ef95..0586b1a 100644
--- a/test/test_latency.cpp
+++ b/test/test_latency.cpp
@@ -11,7 +11,7 @@
 
 #define LOG(msg) fprintf(stderr, "%s\n", msg);
 
-int main(int argc, char * argv[])
+int main(int /*argc*/, char * /*argv*/[])
 {
 #ifdef CUBEB_GECKO_BUILD
   ScopedXPCOM xpcom("test_latency");
diff --git a/test/test_record.cpp b/test/test_record.cpp
index 5dbfb61..681e164 100644
--- a/test/test_record.cpp
+++ b/test/test_record.cpp
@@ -33,7 +33,7 @@ struct user_state
   bool seen_noise;
 };
 
-long data_cb(cubeb_stream *stream, void *user, const void * inputbuffer, void *outputbuffer, long nframes)
+long data_cb(cubeb_stream * stream, void * user, const void * inputbuffer, void * outputbuffer, long nframes)
 {
   user_state * u = reinterpret_cast<user_state*>(user);
 #if STREAM_FORMAT != CUBEB_SAMPLE_FLOAT32LE
@@ -58,7 +58,7 @@ long data_cb(cubeb_stream *stream, void *user, const void * inputbuffer, void *o
   return nframes;
 }
 
-void state_cb(cubeb_stream *stream, void *user, cubeb_state state)
+void state_cb(cubeb_stream * stream, void * /*user*/, cubeb_state state)
 {
   if (stream == NULL)
     return;
@@ -77,7 +77,7 @@ void state_cb(cubeb_stream *stream, void *user, cubeb_state state)
   return;
 }
 
-int main(int argc, char *argv[])
+int main(int /*argc*/, char * /*argv*/[])
 {
 #ifdef CUBEB_GECKO_BUILD
   ScopedXPCOM xpcom("test_record");
diff --git a/test/test_resampler.cpp b/test/test_resampler.cpp
index fc3ecf8..00b256d 100644
--- a/test/test_resampler.cpp
+++ b/test/test_resampler.cpp
@@ -283,7 +283,7 @@ uint32_t fill_with_sine(float * buf, uint32_t rate, uint32_t channels,
   return initial_phase;
 }
 
-long data_cb(cubeb_stream * stm, void * user_ptr,
+long data_cb(cubeb_stream * /*stm*/, void * user_ptr,
              const void * input_buffer, void * output_buffer, long frame_count)
 {
   osc_state * state = reinterpret_cast<osc_state*>(user_ptr);
@@ -464,7 +464,7 @@ void test_delay_line()
   }
 }
 
-long test_output_only_noop_data_cb(cubeb_stream * stm, void * user_ptr,
+long test_output_only_noop_data_cb(cubeb_stream * /*stm*/, void * /*user_ptr*/,
                                    const void * input_buffer,
                                    void * output_buffer, long frame_count)
 {
@@ -500,7 +500,7 @@ void test_output_only_noop()
   cubeb_resampler_destroy(resampler);
 }
 
-long test_drain_data_cb(cubeb_stream * stm, void * user_ptr,
+long test_drain_data_cb(cubeb_stream * /*stm*/, void * /*user_ptr*/,
                         const void * input_buffer,
                         void * output_buffer, long frame_count)
 {
diff --git a/test/test_sanity.cpp b/test/test_sanity.cpp
index 36f903f..de4b6a8 100644
--- a/test/test_sanity.cpp
+++ b/test/test_sanity.cpp
@@ -36,7 +36,7 @@ static uint64_t total_frames_written;
 static int delay_callback;
 
 static long
-test_data_callback(cubeb_stream * stm, void * user_ptr, const void * inputbuffer, void * outputbuffer, long nframes)
+test_data_callback(cubeb_stream * stm, void * user_ptr, const void * /*inputbuffer*/, void * outputbuffer, long nframes)
 {
   assert(stm && user_ptr == &dummy && outputbuffer && nframes > 0);
 #if (defined(_WIN32) || defined(__WIN32__))
@@ -53,7 +53,7 @@ test_data_callback(cubeb_stream * stm, void * user_ptr, const void * inputbuffer
 }
 
 void
-test_state_callback(cubeb_stream * stm, void * user_ptr, cubeb_state state)
+test_state_callback(cubeb_stream * /*stm*/, void * /*user_ptr*/, cubeb_state /*state*/)
 {
 }
 
@@ -494,7 +494,7 @@ static int do_drain;
 static int got_drain;
 
 static long
-test_drain_data_callback(cubeb_stream * stm, void * user_ptr, const void * inputbuffer, void * outputbuffer, long nframes)
+test_drain_data_callback(cubeb_stream * stm, void * user_ptr, const void * /*inputbuffer*/, void * outputbuffer, long nframes)
 {
   assert(stm && user_ptr == &dummy && outputbuffer && nframes > 0);
   if (do_drain == 1) {
@@ -513,7 +513,7 @@ test_drain_data_callback(cubeb_stream * stm, void * user_ptr, const void * input
 }
 
 void
-test_drain_state_callback(cubeb_stream * stm, void * user_ptr, cubeb_state state)
+test_drain_state_callback(cubeb_stream * /*stm*/, void * /*user_ptr*/, cubeb_state state)
 {
   if (state == CUBEB_STATE_DRAINED) {
     assert(!got_drain);
@@ -608,7 +608,7 @@ int is_windows_7()
 }
 
 int
-main(int argc, char * argv[])
+main(int /*argc*/, char * /*argv*/[])
 {
 #ifdef CUBEB_GECKO_BUILD
   ScopedXPCOM xpcom("test_sanity");
diff --git a/test/test_tone.cpp b/test/test_tone.cpp
index ae5ac80..3c6e0ec 100644
--- a/test/test_tone.cpp
+++ b/test/test_tone.cpp
@@ -34,7 +34,7 @@ struct cb_user_data {
   long position;
 };
 
-long data_cb(cubeb_stream *stream, void *user, const void* inputbuffer, void *outputbuffer, long nframes)
+long data_cb(cubeb_stream *stream, void *user, const void* /*inputbuffer*/, void *outputbuffer, long nframes)
 {
   struct cb_user_data *u = (struct cb_user_data *)user;
 #if (defined(_WIN32) || defined(__WIN32__))
@@ -98,7 +98,7 @@ void state_cb(cubeb_stream *stream, void *user, cubeb_state state)
   return;
 }
 
-int main(int argc, char *argv[])
+int main(int /*argc*/, char * /*argv*/[])
 {
 #ifdef CUBEB_GECKO_BUILD
   ScopedXPCOM xpcom("test_tone");