diff --git a/tests/Makefile.am b/tests/Makefile.am
index 994e68e8cfb1ea14d8da2c50b5125c1dc57144c8..3e3d38258c456deddb14bc189a77df8e90d3b625 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -15,13 +15,13 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # Add the source directory and debug to CFLAGS
-AM_CFLAGS = -I../src -DCPU_TPS=2.67e9 $(HDF5_CPPFLAGS) -DTIMER -O0 -g
+AM_CFLAGS = -I../src -DCPU_TPS=2.67e9 $(HDF5_CPPFLAGS) -DTIMER
 
 
 AM_LDFLAGS = ../src/.libs/libswiftsim.a $(HDF5_LDFLAGS) $(HDF5_LIBS)
 
 # List of programs and scripts to run in the test suite
-TESTS = testGreetings testSingle testReading.sh
+TESTS = testGreetings testReading.sh testSingle 
 
 
 # List of test programs to compile