diff --git a/Code/Mantid/Framework/CurveFitting/test/ChebfunBaseTest.h b/Code/Mantid/Framework/CurveFitting/test/ChebfunBaseTest.h
index 6e09f3c68f77..ab6c4e4ad037 100644
--- a/Code/Mantid/Framework/CurveFitting/test/ChebfunBaseTest.h
+++ b/Code/Mantid/Framework/CurveFitting/test/ChebfunBaseTest.h
@@ -158,7 +158,7 @@ class ChebfunBaseTest : public CxxTest::TestSuite {
 
   void test_roots_SinCos()
   {
-    do_test_roots(SinCos,-M_PI,M_PI,2, 1e-10);
+    do_test_roots(SinCos,-M_PI,M_PI,2, 1e-5);
   }
 
 private: