diff --git a/shellkin b/shellkin
index 6503b36..21c9cc1 100755
--- a/shellkin
+++ b/shellkin
@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
-# This script was generated by bashly 1.4.0 (https://bashly.dev)
+# This script was generated by bashly 2.0.0.rc1 (https://bashly.dev)
 # Modifying it manually is not recommended
 
-# :wrapper.bash3_bouncer
+# :wrapper.bash_version_bouncer
 if ((BASH_VERSINFO[0] < 4 || (BASH_VERSINFO[0] == 4 && BASH_VERSINFO[1] < 2))); then
   printf "bash version 4.2 or higher is required\n" >&2
   exit 1
@@ -342,7 +342,7 @@ inspect_args() {
   local k
 
   if ((${#args[@]})); then
-    readarray -t sorted_keys < <(printf '%s\n' "${!args[@]}" | sort)
+    readarray -t sorted_keys < <(printf '%s\n' "${!args[@]}" | LC_ALL=C sort)
     echo args:
     for k in "${sorted_keys[@]}"; do
       echo "- \${args[$k]} = ${args[$k]}"
@@ -1806,6 +1806,8 @@ step_run() {
   local j
   local step_type
   local body
+  local capture_index
+  local capture_value
   local -a tokens=()
   local -a capture_indexes=()
 
@@ -1830,7 +1832,16 @@ step_run() {
       fi
 
       for j in "${!tokens[@]}"; do
-        printf -v "${tokens[$j]}" '%s' "${BASH_REMATCH[${capture_indexes[$j]}]}"
+        capture_index=${capture_indexes[$j]}
+        if [[ $capture_index == q* ]]; then
+          capture_index=${capture_index#q}
+          capture_value=${BASH_REMATCH[$capture_index]}
+          capture_value=${capture_value:1:-1}
+        else
+          capture_value=${BASH_REMATCH[$capture_index]}
+        fi
+
+        printf -v "${tokens[$j]}" '%s' "$capture_value"
         export "${tokens[$j]}"
       done
 
@@ -2220,7 +2231,6 @@ pattern_regex() {
   local remainder=$pattern
   local literal
   local quote
-  local quote_group
 
   while [[ $remainder =~ ^([^{}]*)\{([A-Za-z_][A-Za-z0-9_]*)\}(.*)$ ]]; do
     literal=${BASH_REMATCH[1]}
@@ -2236,12 +2246,9 @@ pattern_regex() {
     if [[ -n $quote ]]; then
       literal=${literal%?}
       remainder=${remainder#?}
-      ((capture_index += 1))
-      quote_group=$capture_index
 
       compiled+=$(_pattern_escape_literal "$literal")
-      compiled+='(['\''"])'
-      compiled+="(.+)\\$quote_group"
+      compiled+="('.+'|\".+\")"
       ((capture_index += 1))
       continue
     fi
@@ -2290,8 +2297,8 @@ pattern_capture_indexes() {
 
     if [[ -n $quote ]]; then
       remainder=${remainder#?}
-      ((capture_index += 2))
-      indexes+=("$capture_index")
+      ((capture_index += 1))
+      indexes+=("q$capture_index")
       continue
     fi
 
@@ -2835,9 +2842,13 @@ bashly_run() {
   esac
 }
 
-if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
-  # :command.start
+# :command.start
+start() {
   command_line_args=("$@")
   initialize
   bashly_run "${command_line_args[@]}"
+}
+
+if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+  start "$@"
 fi
diff --git a/src/lib/step/core.sh b/src/lib/step/core.sh
index 5652430..6f57509 100644
--- a/src/lib/step/core.sh
+++ b/src/lib/step/core.sh
@@ -25,6 +25,8 @@ step_run() {
   local j
   local step_type
   local body
+  local capture_index
+  local capture_value
   local -a tokens=()
   local -a capture_indexes=()
 
@@ -49,7 +51,16 @@ step_run() {
       fi
 
       for j in "${!tokens[@]}"; do
-        printf -v "${tokens[$j]}" '%s' "${BASH_REMATCH[${capture_indexes[$j]}]}"
+        capture_index=${capture_indexes[$j]}
+        if [[ $capture_index == q* ]]; then
+          capture_index=${capture_index#q}
+          capture_value=${BASH_REMATCH[$capture_index]}
+          capture_value=${capture_value:1:-1}
+        else
+          capture_value=${BASH_REMATCH[$capture_index]}
+        fi
+
+        printf -v "${tokens[$j]}" '%s' "$capture_value"
         export "${tokens[$j]}"
       done
 
diff --git a/src/lib/stepdef/pattern.sh b/src/lib/stepdef/pattern.sh
index e60c86e..bfa1d69 100644
--- a/src/lib/stepdef/pattern.sh
+++ b/src/lib/stepdef/pattern.sh
@@ -6,7 +6,6 @@ pattern_regex() {
   local remainder=$pattern
   local literal
   local quote
-  local quote_group
 
   while [[ $remainder =~ ^([^{}]*)\{([A-Za-z_][A-Za-z0-9_]*)\}(.*)$ ]]; do
     literal=${BASH_REMATCH[1]}
@@ -22,12 +21,9 @@ pattern_regex() {
     if [[ -n $quote ]]; then
       literal=${literal%?}
       remainder=${remainder#?}
-      ((capture_index += 1))
-      quote_group=$capture_index
 
       compiled+=$(_pattern_escape_literal "$literal")
-      compiled+='(['\''"])'
-      compiled+="(.+)\\$quote_group"
+      compiled+="('.+'|\".+\")"
       ((capture_index += 1))
       continue
     fi
@@ -78,8 +74,8 @@ pattern_capture_indexes() {
 
     if [[ -n $quote ]]; then
       remainder=${remainder#?}
-      ((capture_index += 2))
-      indexes+=("$capture_index")
+      ((capture_index += 1))
+      indexes+=("q$capture_index")
       continue
     fi
 
diff --git a/test/lib/step/core.bats b/test/lib/step/core.bats
index a0ecf6e..b8d378c 100644
--- a/test/lib/step/core.bats
+++ b/test/lib/step/core.bats
@@ -55,6 +55,15 @@ teardown() {
   [ "$STEP_RESULT" = "Something's wrong" ]
 }
 
+@test "step_run rejects mismatched quote delimiters" {
+  stepdef_parse "@Then the text should include '{text}'"
+  stepdef_register 'STEP_RESULT="$text"'
+
+  ! step_run Then "the text should include 'mismatched\""
+
+  [ -z "$STEP_RESULT" ]
+}
+
 @test "step_run returns non-zero when no step definition matches" {
   stepdef_parse "@When I run '{command}'"
   stepdef_register 'run "$command"'
diff --git a/test/lib/stepdef/files.bats b/test/lib/stepdef/files.bats
index 03cbdec..98c1f3b 100644
--- a/test/lib/stepdef/files.bats
+++ b/test/lib/stepdef/files.bats
@@ -42,9 +42,9 @@ EOF
   [ "${#STEPDEF_TYPES[@]}" -eq 2 ]
   [ "${STEPDEF_TYPES[0]}" = "When" ]
   [ "${STEPDEF_TYPES[1]}" = "Then" ]
-  [ "${STEPDEF_REGEXES[0]}" = "I run (['\"])(.+)\\1" ]
-  [ "${STEPDEF_CAPTURE_INDEXES_LIST[0]}" = "2" ]
-  [ "${STEPDEF_CAPTURE_INDEXES_LIST[1]}" = "2" ]
+  [ "${STEPDEF_REGEXES[0]}" = "I run ('.+'|\".+\")" ]
+  [ "${STEPDEF_CAPTURE_INDEXES_LIST[0]}" = "q1" ]
+  [ "${STEPDEF_CAPTURE_INDEXES_LIST[1]}" = "q1" ]
 }
 
 @test "stepdefs_file_parse preserves multi-line step bodies" {
diff --git a/test/lib/stepdef/parse.bats b/test/lib/stepdef/parse.bats
index f402a79..207280c 100644
--- a/test/lib/stepdef/parse.bats
+++ b/test/lib/stepdef/parse.bats
@@ -40,8 +40,8 @@ teardown() {
 @test "stepdef_parse derives the regex from the template" {
   stepdef_parse "@Then the file '{path}' should exist"
 
-  [ "$STEPDEF_REGEX" = "the file (['\"])(.+)\\1 should exist" ]
-  [ "$STEPDEF_CAPTURE_INDEXES" = "2" ]
+  [ "$STEPDEF_REGEX" = "the file ('.+'|\".+\") should exist" ]
+  [ "$STEPDEF_CAPTURE_INDEXES" = "q1" ]
 }
 
 @test "stepdef_parse returns token names in declaration order" {
@@ -136,9 +136,9 @@ teardown() {
 
   [ "${STEPDEF_TYPES[0]}" = "When" ]
   [ "${STEPDEF_PATTERNS[0]}" = "I run '{command}'" ]
-  [ "${STEPDEF_REGEXES[0]}" = "I run (['\"])(.+)\\1" ]
+  [ "${STEPDEF_REGEXES[0]}" = "I run ('.+'|\".+\")" ]
   [ "${STEPDEF_TOKENS_LIST[0]}" = "command" ]
-  [ "${STEPDEF_CAPTURE_INDEXES_LIST[0]}" = "2" ]
+  [ "${STEPDEF_CAPTURE_INDEXES_LIST[0]}" = "q1" ]
   [ "${STEPDEF_BODIES[0]}" = 'run "$command"' ]
 }
 
@@ -154,6 +154,6 @@ teardown() {
   [ "${STEPDEF_TYPES[1]}" = "Then" ]
   [ "${STEPDEF_TOKENS_LIST[0]}" = "directory" ]
   [ "${STEPDEF_TOKENS_LIST[1]}" = "path" ]
-  [ "${STEPDEF_CAPTURE_INDEXES_LIST[0]}" = "2" ]
-  [ "${STEPDEF_CAPTURE_INDEXES_LIST[1]}" = "2" ]
+  [ "${STEPDEF_CAPTURE_INDEXES_LIST[0]}" = "q1" ]
+  [ "${STEPDEF_CAPTURE_INDEXES_LIST[1]}" = "q1" ]
 }
diff --git a/test/lib/stepdef/pattern.bats b/test/lib/stepdef/pattern.bats
index cef4cf8..1ac028c 100644
--- a/test/lib/stepdef/pattern.bats
+++ b/test/lib/stepdef/pattern.bats
@@ -15,14 +15,14 @@ teardown() {
   run pattern_regex "I run '{command}'"
 
   [ "$status" -eq 0 ]
-  [ "$output" = "I run (['\"])(.+)\\1" ]
+  [ "$output" = "I run ('.+'|\".+\")" ]
 }
 
 @test "pattern_regex treats single and double quoted token delimiters interchangeably" {
   run pattern_regex 'I run "{command}"'
 
   [ "$status" -eq 0 ]
-  [ "$output" = "I run (['\"])(.+)\\1" ]
+  [ "$output" = "I run ('.+'|\".+\")" ]
 }
 
 @test "pattern_regex turns multiple tokens into capture groups" {
@@ -78,5 +78,5 @@ teardown() {
   run pattern_capture_indexes "I copy {source} to '{destination}'"
 
   [ "$status" -eq 0 ]
-  [ "$output" = "1 3" ]
+  [ "$output" = "1 q2" ]
 }