diff --git a/src/gn/xcode_writer.cc b/src/gn/xcode_writer.cc
index 5e57ec9..c2d8857 100644
--- a/src/gn/xcode_writer.cc
+++ b/src/gn/xcode_writer.cc
@@ -100,7 +100,8 @@
 };
 
 const char* kXCTestFileSuffixes[] = {
-    "egtest.m", "egtest.mm", "xctest.m", "xctest.mm", "UITests.m", "UITests.mm",
+    "egtest.m",     "egtest.mm", "egtest.swift", "xctest.m",      "xctest.mm",
+    "xctest.swift", "UITests.m", "UITests.mm",   "UITests.swift",
 };
 
 const char kXCTestModuleTargetNamePostfix[] = "_module";