diff --git a/src/cmd/go/alldocs.go b/src/cmd/go/alldocs.go
index 7f88d3216c..af5671b399 100644
--- a/src/cmd/go/alldocs.go
+++ b/src/cmd/go/alldocs.go
@@ -2658,6 +2658,9 @@
 // 	-failfast
 // 	    Do not start new tests after the first test failure.
 //
+// 	-json
+// 	    Make the test results available in JSON.
+//
 // 	-list regexp
 // 	    List tests, benchmarks, or examples matching the regular expression.
 // 	    No tests, benchmarks or examples will be run. This will only
diff --git a/src/cmd/go/internal/test/test.go b/src/cmd/go/internal/test/test.go
index 59ea1ef544..560f44e610 100644
--- a/src/cmd/go/internal/test/test.go
+++ b/src/cmd/go/internal/test/test.go
@@ -242,6 +242,9 @@ control the execution of any test:
 	-failfast
 	    Do not start new tests after the first test failure.
 
+	-json
+	    Make the test results available in JSON.
+
 	-list regexp
 	    List tests, benchmarks, or examples matching the regular expression.
 	    No tests, benchmarks or examples will be run. This will only