diff --git a/src/cmd/go/alldocs.go b/src/cmd/go/alldocs.go
index 7f88d3216cf..f919699627f 100644
--- a/src/cmd/go/alldocs.go
+++ b/src/cmd/go/alldocs.go
@@ -2658,6 +2658,10 @@
 // 	-failfast
 // 	    Do not start new tests after the first test failure.
 //
+// 	-json
+// 	    Log verbose output and test results in JSON. This presents the
+// 	    same information as the -v flag in a machine-readable format.
+//
 // 	-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 aeba80eb680..ce8f226a969 100644
--- a/src/cmd/go/internal/test/test.go
+++ b/src/cmd/go/internal/test/test.go
@@ -242,6 +242,10 @@ control the execution of any test:
 	-failfast
 	    Do not start new tests after the first test failure.
 
+	-json
+	    Log verbose output and test results in JSON. This presents the
+	    same information as the -v flag in a machine-readable format.
+
 	-list regexp
 	    List tests, benchmarks, or examples matching the regular expression.
 	    No tests, benchmarks or examples will be run. This will only