diff --git a/test/common/README.md b/test/common/README.md
index 6fe330d866be8c..6c8fcf42847a17 100644
--- a/test/common/README.md
+++ b/test/common/README.md
@@ -14,7 +14,7 @@ several other tasks:
   don't accidentally pollute the global namespace.
 
 * Some tests assume a default umask of `0o022`. To enforce this assumption,
-  the common module sets the unmask at startup. Tests that require a
+  the common module sets the umask at startup. Tests that require a
   different umask can override this setting after loading the module.
 
 * Some tests specify runtime flags (example, `--expose-internals`) via a