diff --git a/libcxx/docs/CarolinesTestDoc.txt b/libcxx/docs/CarolinesTestDoc.txt
new file mode 100644
index 0000000000000..607669a551300
--- /dev/null
+++ b/libcxx/docs/CarolinesTestDoc.txt
@@ -0,0 +1,5 @@
+This is a nonsense document, created for the sole purpose of
+triggering libcxx premerge testing (so I can test metrics collection).
+
+This is NOT intended to ever be reviewed or merged or committed. If it gets
+accidentally committed, please remove it asap.