diff --git a/Tests/BasicsTests/Environment/EnvironmentTests.swift b/Tests/BasicsTests/Environment/EnvironmentTests.swift
index 693491de6ec..7c6978d55ee 100644
--- a/Tests/BasicsTests/Environment/EnvironmentTests.swift
+++ b/Tests/BasicsTests/Environment/EnvironmentTests.swift
@@ -18,6 +18,7 @@ import Basics
 import Testing
 import _InternalTestSupport
 
+@Suite(.serialized)
 struct EnvironmentTests {
     @Test
     func initialize() {