diff --git a/.travis.yml b/.travis.yml
index 743136f71..7b15abc94 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,9 +3,11 @@ sudo: required
 matrix:
   include:
     - compiler: gcc
-      env: PLATFORM=device
+      env: PLATFORM=device EXT=elf
     - compiler: clang
-      env: PLATFORM=simulator
+      env: PLATFORM=simulator EXT=elf
+    - compiler: clang
+      env: PLATFORM=blackbox TOOLCHAIN=host-clang EXT=bin QUIZ_USE_CONSOLE=1
 
 os: linux
 before_install:
@@ -15,5 +17,6 @@ before_install:
 - if [ "$CXX" = "g++" ]; then export PATH=gcc-arm-none-eabi-6-2017-q2-update/bin:$PATH; fi
 - if [ "$PLATFORM" = "simulator" ]; then sudo apt-get install libfltk1.3-dev; fi
 script:
-- make clean && make app.elf
-- make clean && make test.elf
+- make clean && make app.$EXT
+- make clean && make test.$EXT
+- if [ "$PLATFORM" = "blackbox" ]; then ./test.$EXT; fi
diff --git a/build/config.mak b/build/config.mak
index f0a73d81f..f9eb4b05e 100644
--- a/build/config.mak
+++ b/build/config.mak
@@ -17,7 +17,9 @@ include build/toolchain.$(TOOLCHAIN).mak
 
 OS_WITH_ONBOARDING_APP ?= 1
 OS_WITH_SOFTWARE_UPDATE_PROMPT ?= 1
+QUIZ_USE_CONSOLE ?= 0
 
 SFLAGS += -DDEBUG=$(DEBUG)
 SFLAGS += -DOS_WITH_ONBOARDING_APP=$(OS_WITH_ONBOARDING_APP)
 SFLAGS += -DOS_WITH_SOFTWARE_UPDATE_PROMPT=$(OS_WITH_SOFTWARE_UPDATE_PROMPT)
+SFLAGS += -DQUIZ_USE_CONSOLE=$(QUIZ_USE_CONSOLE)
diff --git a/ion/src/shared/console_stdio.cpp b/ion/src/shared/console_stdio.cpp
index bb3069fbc..fda0fa3ab 100644
--- a/ion/src/shared/console_stdio.cpp
+++ b/ion/src/shared/console_stdio.cpp
@@ -9,7 +9,7 @@ char readChar() {
 }
 
 void writeChar(char c) {
-  printf("%c", c);
+  putchar(c);
   fflush(stdout);
 }
 
diff --git a/quiz/src/runner.cpp b/quiz/src/runner.cpp
index fd6cfca17..701e587cb 100644
--- a/quiz/src/runner.cpp
+++ b/quiz/src/runner.cpp
@@ -4,6 +4,9 @@
 #include <ion.h>
 
 void print(const char * message) {
+#if QUIZ_USE_CONSOLE
+  Ion::Console::writeLine(message);
+#else
   static int line_y = 0;
   KDContext * ctx = KDIonContext::sharedContext();
   int line_height = KDText::stringSize("M").height();
@@ -13,6 +16,7 @@ void print(const char * message) {
     line_y = 0;
     // Clear screen maybe?
   }
+#endif
 }
 
 void ion_app() {
@@ -24,7 +28,9 @@ void ion_app() {
     i++;
   }
   print("ALL TESTS FINISHED");
+#if !QUIZ_USE_CONSOLE
   while (1) {
     Ion::msleep(1000);
   }
+#endif
 }