diff --git a/.travis.yml b/.travis.yml
index 1e4303d..e0dd6ac 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,5 +2,4 @@ language: C
 install: true
 script:
   - cd tests
-  - make 32
   - make 64
diff --git a/tests/Makefile b/tests/Makefile
index 412cb10..ace27c8 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -1,9 +1,10 @@
 INCLUDE = -I..
+DEFINES = -DSTB_C_LEXER_SELF_TEST
 
 32:
-	$(CC) -m32 $(INCLUDE) ../stb_vorbis.c test_c_compilation.c -lm
-	$(CC) -m32 $(INCLUDE) ../stb_vorbis.c test_cpp_compilation.cpp -lm
+	$(CC) -m32 $(INCLUDE) $(DEFINES) ../stb_vorbis.c test_c_compilation.c ../stb.c -lm
+	$(CC) -m32 $(INCLUDE) $(DEFINES) ../stb_vorbis.c test_cpp_compilation.cpp -lm
 
 64:
-	$(CC) -m64 $(INCLUDE) ../stb_vorbis.c test_c_compilation.c -lm
-	$(CC) -m64 $(INCLUDE) ../stb_vorbis.c test_cpp_compilation.cpp -lm
+	$(CC) -m64 $(INCLUDE) $(DEFINES) ../stb_vorbis.c test_c_compilation.c ../stb.c -lm
+	$(CC) -m64 $(INCLUDE) $(DEFINES) ../stb_vorbis.c test_cpp_compilation.cpp -lm