diff --git a/SC3015.md b/SC3015.md
index 529b9d9..132938a 100644
--- a/SC3015.md
+++ b/SC3015.md
@@ -4,21 +4,36 @@
 
 ```sh
 #!/bin/sh
-[ "$var" =~ foo[0-9]+ ]
+if [ "$var" =~ foo[0-9]+ ]; then
+  echo matched
+fi
 ```
 
 ### Correct code:
 
 ```sh
 #!/bin/sh
-expr "$var" : '.*foo[0-9]\{1,\}' > /dev/null
+if expr "$var" : '.*foo[0-9]\{1,\}' >/dev/null; then
+  echo matched
+fi
+```
+or
+```sh
+#!/bin/sh
+case $var in
+  *foo[0-9]*)
+    echo matched
+    ;;
+esac
 ```
 
 ### Rationale:
 
 You are using `=~` in a script declared to be compatible with POSIX sh or Dash, but `=~` is [not specified by POSIX](https://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html) and is unlikely to work outside `[[ ]]` in Bash and Ksh.
 
-Instead, use `expr`'s `:` operator, which is [specified by POSIX](https://pubs.opengroup.org/onlinepubs/9699919799/utilities/expr.html#tag_20_42_13_01).  It may be necessary to revise the regular expression because `expr` uses [POSIX basic regular expressions](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_03) anchored to the beginning of the string, as opposed to the unanchored [extended regular expressions](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_04) used by `[[ str =~ re ]]` in Bash and Ksh.
+Use [`expr`'s `:` operator](https://pubs.opengroup.org/onlinepubs/9699919799/utilities/expr.html#tag_20_42_13_01) instead.  It may be necessary to revise the regular expression because POSIX `expr` uses [basic regular expressions](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_03) anchored to the beginning of the string, as opposed to the unanchored [extended regular expressions](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_04) used by `[[ str =~ re ]]` in Bash and Ksh.
+
+Alternately, use `case` if the matching can be done with [shell patterns](https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_13) instead of regular expressions.  This avoids the need for an external utility.
 
 ### Exceptions: