diff --git a/test cases/failing/100 subdir parse error/meson.build b/test cases/failing/100 subdir parse error/meson.build
new file mode 100644
index 000000000..ee5bb0cb7
--- /dev/null
+++ b/test cases/failing/100 subdir parse error/meson.build	
@@ -0,0 +1,2 @@
+project('subdir false plusassign', 'c')
+subdir('subdir')
diff --git a/test cases/failing/100 subdir parse error/subdir/meson.build b/test cases/failing/100 subdir parse error/subdir/meson.build
new file mode 100644
index 000000000..3ac5ef938
--- /dev/null
+++ b/test cases/failing/100 subdir parse error/subdir/meson.build	
@@ -0,0 +1 @@
+3 += 4