diff --git a/concat-test/concat-test.py b/concat-test/concat-test.py
index 1620e4d..1518cc8 100755
--- a/concat-test/concat-test.py
+++ b/concat-test/concat-test.py
@@ -8,10 +8,11 @@
 
 def main():
     test_runs = 1000000
+    test_range = 1000
     w = csv.writer(sys.stdout)
     styles = ['plus', 'join', 'format']
     w.writerow([''] + styles)
-    for i in range(10):
+    for i in range(test_range):
         sr = {}
         for style in styles:
             tr = timeit.timeit(
@@ -21,6 +22,7 @@ def main():
             )
             sr[style] = tr
         w.writerow([str(i+1)] + ['%.3f' % (sr[s] * MICRO / test_runs) for s in styles])
+        sys.stdout.flush()
 
 if __name__ == '__main__':
     main()