diff --git a/test cases/common/127 no buildincdir/meson.build b/test cases/common/127 no buildincdir/meson.build
index ac69e8e46..53f1a7f58 100644
--- a/test cases/common/127 no buildincdir/meson.build	
+++ b/test cases/common/127 no buildincdir/meson.build	
@@ -1,5 +1,5 @@
 project('nobuilddir', 'c',
-  default_options : 'werror=true')
+  default_options : ['werror=true', 'buildtype=plain'])
 
 cc = meson.get_compiler('c')