diff --git a/tests/test_cube3d.py b/tests/test_cube3d.py
index 655157274d738ee70175068f1ac30c1da1ff2883..4d56a593d1818299b8b43d8042e763871e25311b 100644
--- a/tests/test_cube3d.py
+++ b/tests/test_cube3d.py
@@ -65,12 +65,15 @@ class test_cube3d(unittest.TestCase):
 
         u.savefits('result.fits')
 
-        plt.figure(figsize=(16,4))
-        plt.plot(u.wave,np.log10(u.flux[50,50,:]),color='blue',label=r'$v=%4.2f$'%(velmap.map[50,50]))
-        plt.plot(u.wave,np.log10(u.flux[5,95,:]),color='red',label=r'$v=%4.2f$'%(velmap.map[5,95]))
-        plt.xlim(3500,9500)
-        plt.legend(frameon=False)
-        plt.savefig('./image/test_cube3d_spec.png')
+        if np.sum(u.flux[50,50,:]) != np.sum(u.flux[5,95,:]):
+            print("No Problem!")
+
+        #plt.figure(figsize=(16,4))
+        #plt.plot(u.wave,np.log10(u.flux[50,50,:]),color='blue',label=r'$v=%4.2f$'%(velmap.map[50,50]))
+        #plt.plot(u.wave,np.log10(u.flux[5,95,:]),color='red',label=r'$v=%4.2f$'%(velmap.map[5,95]))
+        #plt.xlim(3500,9500)
+        #plt.legend(frameon=False)
+        #plt.savefig('./image/test_cube3d_spec.png')
 
         print("-----------------------------------------------------------------")
         print(">>> Unit test for **Spec Cube** Modelling has been passed!")