diff --git a/Makefile b/Makefile
index 363cd00..14140da 100644
--- a/Makefile
+++ b/Makefile
@@ -35,10 +35,10 @@ install: rpaheui-c rpaheui-bigint-c
 	cp rpaheui-c /usr/local/bin/rpaheui
 	ln -s /usr/local/bin/rpaheui /usr/local/bin/aheui
 
-test-bigint:
+test-bigint-c:
 	cd snippets && AHEUI="../rpaheui-bigint-c" bash test.sh
 
-test-smallint:
+test-c:
 	cd snippets && AHEUI="../rpaheui-c" bash test.sh --disable integer
 
 test-py:
diff --git a/aheui/option.py b/aheui/option.py
index c3860ab..ed214e5 100644
--- a/aheui/option.py
+++ b/aheui/option.py
@@ -10,7 +10,7 @@
 
 
 parser = ArgumentParser(prog='aheui')
-parser.add_argument('--opt', '-O', default='2', choices='0,1,2', description='Set optimization level.', full_description="""\t0: No optimization.
+parser.add_argument('--opt', '-O', default='1', choices='0,1,2', description='Set optimization level.', full_description="""\t0: No optimization.
 \t1: Quickly resolve deadcode by rough stacksize emulation and merge constant operations.
 \t2: Perfectly resolve deadcode by stacksize emulation, reserialize code chunks and merge constant operations.
 """)
diff --git a/aheui/version.py b/aheui/version.py
index 6937870..56d2535 100644
--- a/aheui/version.py
+++ b/aheui/version.py
@@ -1 +1 @@
-VERSION = '1.2.4'
+VERSION = '1.2.5'