diff --git a/test cases/common/50 subproject options/subprojects/subproject/meson.build b/test cases/common/50 subproject options/subprojects/subproject/meson.build
index 1f52e1924..5000b8643 100644
--- a/test cases/common/50 subproject options/subprojects/subproject/meson.build	
+++ b/test cases/common/50 subproject options/subprojects/subproject/meson.build	
@@ -1,5 +1,5 @@
 project('subproject', 'c')
 
 if get_option('opt')
-  error('option unset when it should be set.')
+  error('option set when it should be unset.')
 endif