From 66d86e04adb7509f0832a4b23426c323fb8a8417 Mon Sep 17 00:00:00 2001
From: jstilley <jstilley@terrapower.com>
Date: Fri, 12 Jan 2024 09:51:52 -0800
Subject: [PATCH] Improving fluid material expansion test

---
 armi/materials/tests/test_materials.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/armi/materials/tests/test_materials.py b/armi/materials/tests/test_materials.py
index abc79f455..aa670d947 100644
--- a/armi/materials/tests/test_materials.py
+++ b/armi/materials/tests/test_materials.py
@@ -981,13 +981,13 @@ def test_volumetricExpansion(self):
     def test_linearExpansion(self):
         """Unit tests for lead materials linear expansion.
 
-        .. test:: There is a base class for fluid materials.
+        .. test:: Fluid materials do not linearly expand, at any temperature.
             :id: T_ARMI_MAT_FLUID2
             :tests: R_ARMI_MAT_FLUID
         """
-        cur = self.mat.linearExpansion(400)
-        ref = 0.0
-        self.assertEqual(cur, ref)
+        for t in range(300, 901, 25):
+            cur = self.mat.linearExpansion(t)
+            self.assertEqual(cur, 0)
 
     def test_setDefaultMassFracs(self):
         """