diff --git a/tests/integration/test_helper.py b/tests/integration/test_helper.py
index 7b2226e..387eb5a 100644
--- a/tests/integration/test_helper.py
+++ b/tests/integration/test_helper.py
@@ -7,6 +7,15 @@ from pywasm import Runtime
 
 from .helpers import wat2wasm
 
+def run(code_wat):
+    code_wasm = wat2wasm(code_wat)
+    module = binary.Module.from_reader(io.BytesIO(code_wasm))
+
+    runtime = Runtime(module, {}, {})
+
+    out_put = runtime.exec('testEntry', [])
+    return (runtime, out_put)
+
 @pytest.mark.parametrize('size,offset,exp_out_put', [
     ('32', 0,         0x3020100),
     ('32', 1,         0x4030201),
@@ -24,12 +33,8 @@ def test_i32_64_load(size, offset, exp_out_put):
       i{size}.load
       return ))
 """
-    code_wasm = wat2wasm(code_wat)
-    module = binary.Module.from_reader(io.BytesIO(code_wasm))
 
-    runtime = Runtime(module, {}, {})
-
-    out_put = runtime.exec('testEntry', [])
+    (_, out_put) = run(code_wat)
     assert exp_out_put == out_put
 
 def test_load_then_store():
@@ -58,12 +63,8 @@ def test_load_then_store():
       i32.const 9
       return ))
 """
-    code_wasm = wat2wasm(code_wat)
-    module = binary.Module.from_reader(io.BytesIO(code_wasm))
+    (runtime, out_put) = run(code_wat)
 
-    runtime = Runtime(module, {}, {})
-
-    out_put = runtime.exec('testEntry', [])
     assert 9 == out_put
 
     assert (b'\x0c'+ b'\00' * 23) == runtime.store.mems[0].data[:24]