diff --git a/example/README.md b/example/README.md
index 47d4a52f9..fcad4779f 100644
--- a/example/README.md
+++ b/example/README.md
@@ -41,6 +41,9 @@ COMMANDS
        opt [--debug] [--unsafe] [OPTION]… [ARG]…
            Optimize a module
 
+       rac [--unsafe] [OPTION]… [ARG]…
+           Perform runtime assertion checking
+
        run [OPTION]… [ARG]…
            Run the concrete interpreter
 
diff --git a/test/help/help.t b/test/help/help.t
index 40af8eebf..e01148f22 100644
--- a/test/help/help.t
+++ b/test/help/help.t
@@ -19,6 +19,9 @@ no subcommand should print help
          opt [--debug] [--unsafe] [OPTION]… [ARG]…
              Optimize a module
   
+         rac [--unsafe] [OPTION]… [ARG]…
+             Perform runtime assertion checking
+  
          run [OPTION]… [ARG]…
              Run the concrete interpreter
   
diff --git a/test/script/gc.t b/test/script/gc.t
index c70b5be10..7aa946edf 100644
--- a/test/script/gc.t
+++ b/test/script/gc.t
@@ -1,23 +1,23 @@
   $ owi script --no-exhaustion reference/proposals/gc/array.wast
-  unknown operator unknown operator "array.get_s"
+  unknown operator "array.get_s"
   [23]
   $ owi script --no-exhaustion reference/proposals/gc/br_on_cast_fail.wast
-  unknown operator unknown operator "any.convert_extern"
+  unknown operator "any.convert_extern"
   [23]
   $ owi script --no-exhaustion reference/proposals/gc/br_on_cast.wast
-  unknown operator unknown operator "any.convert_extern"
+  unknown operator "any.convert_extern"
   [23]
   $ owi script --no-exhaustion reference/proposals/gc/call_ref.wast
   unknown type $ii
   [52]
   $ owi script --no-exhaustion reference/proposals/gc/extern.wast
-  unknown operator unknown operator "any.convert_extern"
+  unknown operator "any.convert_extern"
   [23]
   $ owi script --no-exhaustion reference/proposals/gc/i31.wast
-  unknown operator unknown operator "i31ref"
+  unknown operator "i31ref"
   [23]
   $ owi script --no-exhaustion reference/proposals/gc/ref_cast.wast
-  unknown operator unknown operator "any.convert_extern"
+  unknown operator "any.convert_extern"
   [23]
   $ owi script --no-exhaustion reference/proposals/gc/ref_eq.wast
   owi: internal error, uncaught exception:
@@ -25,13 +25,13 @@
        
   [125]
   $ owi script --no-exhaustion reference/proposals/gc/ref_test.wast
-  unknown operator unknown operator "any.convert_extern"
+  unknown operator "any.convert_extern"
   [23]
   $ owi script --no-exhaustion reference/proposals/gc/return_call_ref.wast
   unknown type $i64-i64
   [52]
   $ owi script --no-exhaustion reference/proposals/gc/struct.wast
-  unknown operator unknown operator "struct.get_u"
+  unknown operator "struct.get_u"
   [23]
   $ owi script --no-exhaustion reference/proposals/gc/type-subtyping.wast
   unexpected token "ref"