diff --git a/test/build.cake b/test/build.cake
index a9d0f57..74254c2 100644
--- a/test/build.cake
+++ b/test/build.cake
@@ -21,7 +21,6 @@ sources = script.cwd([
   'counted.cpp',
   'generator_tests.cpp',
   'recursive_generator_tests.cpp',
-  'async_generator_tests.cpp',
   'async_auto_reset_event_tests.cpp',
   'async_manual_reset_event_tests.cpp',
   'async_mutex_tests.cpp',