diff --git a/pkgs/build-support/testers/testEqualArrayOrMap/assert-equal-array.sh b/pkgs/build-support/testers/testEqualArrayOrMap/assert-equal-array.sh
index ef43dedba625..b8c292ffed5e 100644
--- a/pkgs/build-support/testers/testEqualArrayOrMap/assert-equal-array.sh
+++ b/pkgs/build-support/testers/testEqualArrayOrMap/assert-equal-array.sh
@@ -1,11 +1,5 @@
 # shellcheck shell=bash
 
-# Tests if an array is declared.
-isDeclaredArray() {
-  # shellcheck disable=SC2034
-  local -nr arrayRef="$1" && [[ ${!arrayRef@a} =~ a ]]
-}
-
 # Asserts that two arrays are equal, printing out differences if they are not.
 # Does not short circuit on the first difference.
 assertEqualArray() {
@@ -19,12 +13,12 @@ assertEqualArray() {
   local -nr actualArrayRef="$2"
 
   if ! isDeclaredArray "${!expectedArrayRef}"; then
-    nixErrorLog "first arugment expectedArrayRef must be an array reference to a declared array"
+    nixErrorLog "first argument expectedArrayRef must be a reference to an indexed array"
     exit 1
   fi
 
   if ! isDeclaredArray "${!actualArrayRef}"; then
-    nixErrorLog "second arugment actualArrayRef must be an array reference to a declared array"
+    nixErrorLog "second argument actualArrayRef must be a reference to an indexed array"
     exit 1
   fi
 
diff --git a/pkgs/build-support/testers/testEqualArrayOrMap/assert-equal-map.sh b/pkgs/build-support/testers/testEqualArrayOrMap/assert-equal-map.sh
index b601f9e424e9..1469f94565dd 100644
--- a/pkgs/build-support/testers/testEqualArrayOrMap/assert-equal-map.sh
+++ b/pkgs/build-support/testers/testEqualArrayOrMap/assert-equal-map.sh
@@ -1,11 +1,5 @@
 # shellcheck shell=bash
 
-# Tests if a map is declared.
-isDeclaredMap() {
-  # shellcheck disable=SC2034
-  local -nr mapRef="$1" && [[ ${!mapRef@a} =~ A ]]
-}
-
 # Asserts that two maps are equal, printing out differences if they are not.
 # Does not short circuit on the first difference.
 assertEqualMap() {
@@ -19,26 +13,15 @@ assertEqualMap() {
   local -nr actualMapRef="$2"
 
   if ! isDeclaredMap "${!expectedMapRef}"; then
-    nixErrorLog "first arugment expectedMapRef must be an associative array reference to a declared associative array"
+    nixErrorLog "first argument expectedMapRef must be a reference to an associative array"
     exit 1
   fi
 
   if ! isDeclaredMap "${!actualMapRef}"; then
-    nixErrorLog "second arugment actualMapRef must be an associative array reference to a declared associative array"
+    nixErrorLog "second argument actualMapRef must be a reference to an associative array"
     exit 1
   fi
 
-  # NOTE:
-  # From the `sort` manpage: "The locale specified by the environment affects sort order. Set LC_ALL=C to get the
-  # traditional sort order that uses native byte values."
-  # We specify the environment variable in a subshell to avoid polluting the caller's environment.
-
-  local -a sortedExpectedKeys
-  mapfile -d '' -t sortedExpectedKeys < <(printf '%s\0' "${!expectedMapRef[@]}" | LC_ALL=C sort --stable --zero-terminated)
-
-  local -a sortedActualKeys
-  mapfile -d '' -t sortedActualKeys < <(printf '%s\0' "${!actualMapRef[@]}" | LC_ALL=C sort --stable --zero-terminated)
-
   local -ir expectedLength=${#expectedMapRef[@]}
   local -ir actualLength=${#actualMapRef[@]}
 
@@ -49,6 +32,12 @@ assertEqualMap() {
     hasDiff=1
   fi
 
+  local -a sortedExpectedKeys=()
+  getSortedMapKeys "${!expectedMapRef}" sortedExpectedKeys
+
+  local -a sortedActualKeys=()
+  getSortedMapKeys "${!actualMapRef}" sortedActualKeys
+
   local -i expectedKeyIdx=0
   local expectedKey
   local expectedValue
diff --git a/pkgs/build-support/testers/testEqualArrayOrMap/default.nix b/pkgs/build-support/testers/testEqualArrayOrMap/default.nix
index 4dc17d0e2b58..31bbc7fe3f12 100644
--- a/pkgs/build-support/testers/testEqualArrayOrMap/default.nix
+++ b/pkgs/build-support/testers/testEqualArrayOrMap/default.nix
@@ -1,4 +1,5 @@
 {
+  arrayUtilities,
   lib,
   stdenvNoCC,
 }:
@@ -21,7 +22,10 @@ lib.makeOverridable (
     inherit name;
 
     nativeBuildInputs = [
+      arrayUtilities.isDeclaredArray
       ./assert-equal-array.sh
+      arrayUtilities.isDeclaredMap
+      arrayUtilities.getSortedMapKeys
       ./assert-equal-map.sh
     ];