diff --git a/lib/getopts/getopts_long.sh b/lib/getopts/getopts_long.sh
index fb78382..261c92d 100644
--- a/lib/getopts/getopts_long.sh
+++ b/lib/getopts/getopts_long.sh
@@ -84,7 +84,7 @@ in
 								OPTARG_LONG=${OPTARG_LONG#--}
 								;;
 							(*)
-								echo "option '--${__optstring%%[:?,]*}' doesn't allow an argument" >&2
+								echo "option \`--${__optstring%%[:?,]*}' doesn't allow an argument" >&2
 								;;
 						esac
 						: $((OPTIND_LONG+=1))
@@ -122,7 +122,7 @@ in
 										read -r "$2" <<-EOF
 										?
 										EOF
-										echo "option '$3' requires an argument" >&2
+										echo "option \`$3' requires an argument" >&2
 										;;
 								esac
 
@@ -159,7 +159,7 @@ in
 						OPTARG_LONG=${OPTARG_LONG#--}
 						;;
 					(*)
-						echo "unrecognized option '$3'" >&2
+						echo "unrecognized option \`$3'" >&2
 						;;
 				esac
 
diff --git a/spec/getopts/getopts_long.spec b/spec/getopts/getopts_long.spec
index 6b0e2ab..0b5f64c 100644
--- a/spec/getopts/getopts_long.spec
+++ b/spec/getopts/getopts_long.spec
@@ -74,7 +74,7 @@ Describe 'getopts/getopts_long'
 
       The status should be success
       The stdout should equal ''
-      The stderr should equal 'unrecognized option '\''--illegal'\'''
+      The stderr should equal 'unrecognized option `--illegal'\'''
 
       The variable _opt should equal '?'
       The variable OPTARG_LONG should be undefined
@@ -146,7 +146,7 @@ Describe 'getopts/getopts_long'
 
       The status should be success
       The stdout should equal ''
-      The stderr should equal 'option '\''--required'\'' requires an argument'
+      The stderr should equal 'option `--required'\'' requires an argument'
 
       The variable _opt should equal '?'
       The variable OPTARG_LONG should be undefined
@@ -233,7 +233,7 @@ Describe 'getopts/getopts_long'
 
       The status should be success
       The stdout should equal ''
-      The stderr should equal 'option '\''--flag'\'' doesn'\''t allow an argument'
+      The stderr should equal 'option `--flag'\'' doesn'\''t allow an argument'
 
       The variable _opt should equal '?'
       The variable OPTARG_LONG should be undefined