diff --git a/test/test_mnist.py b/test/test_mnist.py
index e706a374..39d7eecd 100644
--- a/test/test_mnist.py
+++ b/test/test_mnist.py
@@ -25,9 +25,9 @@ class TinyBobNet:
 class TinyConvNet:
   def __init__(self):
     conv = 7
-    self.chans = 4
-    self.c1 = Tensor(layer_init_uniform(self.chans,1,conv,conv))
-    self.l1 = Tensor(layer_init_uniform(((28-conv+1)**2)*self.chans, 128))
+    chans = 4
+    self.c1 = Tensor(layer_init_uniform(chans,1,conv,conv))
+    self.l1 = Tensor(layer_init_uniform(((28-conv+1)**2)*chans, 128))
     self.l2 = Tensor(layer_init_uniform(128, 10))
 
   def forward(self, x):