diff --git a/renderdoc/maths/formatpacking.cpp b/renderdoc/maths/formatpacking.cpp
index c711eef9f..cb4c2272e 100644
--- a/renderdoc/maths/formatpacking.cpp
+++ b/renderdoc/maths/formatpacking.cpp
@@ -1349,7 +1349,7 @@ TEST_CASE("Check format conversion", "[format]")
 
       INFO(a);
       INFO(c);
-      CHECK(fabs(a - c) <= fabs(a * 3.0f * FLT_EPSILON));
+      CHECK(fabs(a - c) <= fabs(a * 6.0f * FLT_EPSILON));
 
       if(i == UINT16_MAX)
         break;