diff --git a/functions/std_accuracy_test.cpp b/functions/std_accuracy_test.cpp
index 10467eeea0..693397e44c 100644
--- a/functions/std_accuracy_test.cpp
+++ b/functions/std_accuracy_test.cpp
@@ -15,7 +15,6 @@
 
 namespace principia {
 namespace functions {
-namespace _multiprecision {
 
 using ::testing::AnyOf;
 using namespace boost::multiprecision;
@@ -86,6 +85,5 @@ TEST_F(StdAccuracyTest, SinCos) {
 
 #endif
 
-}  // namespace _multiprecision
 }  // namespace functions
 }  // namespace principia