diff --git a/sasmodels/models/fcc_paracrystal.py b/sasmodels/models/fcc_paracrystal.py
index 35b19b16..b8711cfc 100644
--- a/sasmodels/models/fcc_paracrystal.py
+++ b/sasmodels/models/fcc_paracrystal.py
@@ -213,9 +213,10 @@ def random():
 #
 # October 26, 2022, PDB fixed unit tests to conform to new maths
 # TODO: fix the 2d tests
-q = 4.*pi/220.
+# Test position of first Bragg Peak at q = 2.0 * pi * np.sqrt(3) / (np.sqrt(2) * 220)
+q=0.035
 tests = [
-    [{}, [0.001, q, 0.25], [1.9839734995338474, 0.3352457353010224, 0.005804136688760973]],
+    [{}, [0.01, q, 0.25], [0.0213498915484313, 69.03586722100925, 0.005713137547083953]],
     #[{}, (-0.047, -0.007), 238.103096286],
     #[{}, (0.053, 0.063), 0.863609587796],
 ]