diff --git a/test_generators/operations/README.md b/test_generators/operations/README.md
index 4e46c8dcb..e0b9d0e18 100644
--- a/test_generators/operations/README.md
+++ b/test_generators/operations/README.md
@@ -4,7 +4,7 @@ Operations (or "transactions" in previous spec iterations),
  are atomic changes to the state, introduced by embedding in blocks.
 
 This generator provides a series of test suites, divided into handler, for each operation type.
-A operation test-runner can consume these operation test-suites,
+An operation test-runner can consume these operation test-suites,
  and handle different kinds of operations by processing the cases using the specified test handler.
 
 Information on the format of the tests can be found in the [operations test formats documentation](../../specs/test_formats/operations/README.md).