diff --git a/tests/test_utils.py b/tests/test_utils.py
index 68a6005..14b2c08 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -37,8 +37,7 @@ def test_find_nearest():
     assert find_nearest(a,10.1) == 10
 
 # TODO: repair with newer xraydb 4.5.0 when available in conda-forge
-# def test_xray_transmission():
-#    T = xray_transmission(9000, 100e-6, material = 'Si')
-#    assert T == 0.342385039732607
-
+def test_xray_transmission():
+    T = xray_transmission(9000, 100e-6, material = 'Si')
+    assert T == 0.342385039732607