diff --git a/test/tint/builtins/gen/var/atan/d17fb2.wgsl.expected.msl b/test/tint/builtins/gen/var/atan/d17fb2.wgsl.expected.msl
index d74bfda..b0029f9 100644
--- a/test/tint/builtins/gen/var/atan/d17fb2.wgsl.expected.msl
+++ b/test/tint/builtins/gen/var/atan/d17fb2.wgsl.expected.msl
@@ -2,7 +2,7 @@
 
 using namespace metal;
 void atan_d17fb2() {
-  float4 res = float4(0.785398185f);
+  float4 res = float4(0.78539818525314331055f);
 }
 
 struct tint_symbol {