diff --git a/tool/generic_erb.rb b/tool/generic_erb.rb
index ac1ef7db40..5d44738297 100644
--- a/tool/generic_erb.rb
+++ b/tool/generic_erb.rb
@@ -24,7 +24,7 @@ end
 unchanged = "unchanged"
 updated = "updated"
 if color or (color == nil && STDOUT.tty?)
-  if (/\A(?:\e\[.*m|)\z/ =~ IO.popen("tput smso", "r", err: IO::NULL, &:read) rescue nil)
+  if (/\A\e\[.*m\z/ =~ IO.popen("tput smso", "r", err: IO::NULL, &:read) rescue nil)
     beg = "\e["
     colors = (colors = ENV['TEST_COLORS']) ? Hash[colors.scan(/(\w+)=([^:\n]*)/)] : {}
     reset = "#{beg}m"
diff --git a/tool/ifchange b/tool/ifchange
index 4164572b76..7779b28a63 100755
--- a/tool/ifchange
+++ b/tool/ifchange
@@ -48,7 +48,7 @@ msg_begin= msg_unchanged= msg_updated= msg_reset=
 if [ "$color" = always -o \( "$color" = auto -a -t 1 \) ]; then
     msg_begin="["
     case "`tput smso 2>/dev/null`" in
-	"$msg_begin"*m|"")
+	"$msg_begin"*m)
 	    if [ ${TEST_COLORS:+set} ]; then
 		msg_unchanged=`expr ":$TEST_COLORS:" : ".*:pass=\([^:]*\):"`
 		msg_updated=`expr ":$TEST_COLORS:" : ".*:fail=\([^:]*\):"`