test: run some more tests by default

R=golang-dev, remyoudompheng, iant, rsc
CC=golang-dev
https://golang.org/cl/6833043
diff --git a/test/args.go b/test/args.go
index 9cfddc3..0ffe810 100644
--- a/test/args.go
+++ b/test/args.go
@@ -1,7 +1,4 @@
-// $G $F.go && $L $F.$A && ./$A.out arg1 arg2
-
-// NOTE: This test is not run by 'run.go' and so not run by all.bash.
-// To run this test you must use the ./run shell script.
+// run arg1 arg2
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/test/nul1.go b/test/nul1.go
index 968c952..20426b4 100644
--- a/test/nul1.go
+++ b/test/nul1.go
@@ -1,10 +1,4 @@
-// [ "$GORUN" == "" ] || exit 0  # Android runner gets confused by the NUL output 
-// $G $D/$F.go && $L $F.$A && ./$A.out >tmp.go &&
-// errchk $G -e tmp.go
-// rm -f tmp.go
-
-// NOTE: This test is not run by 'run.go' and so not run by all.bash.
-// To run this test you must use the ./run shell script.
+// errorcheckoutput
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/test/run.go b/test/run.go
index 2b874d7..420b5dd 100644
--- a/test/run.go
+++ b/test/run.go
@@ -676,10 +676,7 @@
 }
 
 var skipOkay = map[string]bool{
-	"args.go":                 true,
-	"index.go":                true,
 	"linkx.go":                true,
-	"nul1.go":                 true,
 	"rotate.go":               true,
 	"sigchld.go":              true,
 	"sinit.go":                true,