diff --git a/imagick-fix-457-ensure-format-is-always-lowercase.patch b/imagick-fix-457-ensure-format-is-always-lowercase.patch
new file mode 100644
index 0000000..e0a95d4
--- /dev/null
+++ b/imagick-fix-457-ensure-format-is-always-lowercase.patch
@@ -0,0 +1,37 @@
+From 5cf94f5e119026325081f4e0253769d010e216e7 Mon Sep 17 00:00:00 2001
+From: Remi Collet <remi@remirepo.net>
+Date: Mon, 20 Sep 2021 13:44:02 +0200
+Subject: [PATCH] Fix #457 ensure format is always lowercase
+
+---
+ imagick.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/imagick.c b/imagick.c
+index ac889118..ee725669 100644
+--- a/imagick.c
++++ b/imagick.c
+@@ -3388,6 +3388,7 @@ static zval *php_imagick_read_property(zend_object *object, zend_string *member,
+ 					if (format) {
+ 						retval = rv;
+ 						ZVAL_STRING(retval, format);
++						php_strtolower(Z_STRVAL_P(retval), Z_STRLEN_P(retval));
+ 						IMAGICK_FREE_MAGICK_MEMORY(format);
+ 					} else {
+ 						retval = rv;
+@@ -3460,6 +3461,7 @@ static zval *php_imagick_read_property(zval *object, zval *member, int type, voi
+ 					if (format) {
+ 						retval = rv;
+ 						ZVAL_STRING(retval, format);
++						php_strtolower(Z_STRVAL_P(retval), Z_STRLEN_P(retval));
+ 						IMAGICK_FREE_MAGICK_MEMORY(format);
+ 					} else {
+ 						retval = rv;
+@@ -3542,6 +3544,7 @@ static zval *php_imagick_read_property(zval *object, zval *member, int type, con
+ 
+ 					if (format) {
+ 						ZVAL_STRING(retval, format, 1);
++						php_strtolower(Z_STRVAL_P(retval), Z_STRLEN_P(retval));
+ 						IMAGICK_FREE_MAGICK_MEMORY(format);
+ 					} else {
+ 						ZVAL_STRING(retval, "", 1);
diff --git a/php-imagick.changes b/php-imagick.changes
index 5df855e..7f0416d 100644
--- a/php-imagick.changes
+++ b/php-imagick.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Wed Nov 10 11:10:20 UTC 2021 - Johannes Weberhofer <jweberhofer@weberhofer.at>
+
+- added imagick-fix-457-ensure-format-is-always-lowercase.patch
+  to fix test-failures in latest tumbleweed/factory builds
+  #gh/Imagick/imagick#457
+
 -------------------------------------------------------------------
 Tue Nov  9 22:02:45 UTC 2021 - Arjen de Korte <suse+build@de-korte.org>
 
diff --git a/php-imagick.spec b/php-imagick.spec
index 106ac83..bf12403 100644
--- a/php-imagick.spec
+++ b/php-imagick.spec
@@ -1,5 +1,5 @@
 #
-# spec file for package php-imagick
+# spec file
 #
 # Copyright (c) 2021 SUSE LLC
 #
@@ -39,10 +39,13 @@ Group:          Productivity/Networking/Web/Servers
 URL:            https://pecl.php.net/package/imagick
 Source0:        https://pecl.php.net/get/%{pkg_name}-%{version}.tgz
 Source1:        php-%{pkg_name}-rpmlintrc
+# SUSE: Make build reproduceable
 Patch0:         imagick-reproducible.patch
+# PATCH-FIX-UPSTREAM imagick-fix-457-ensure-format-is-always-lowercase.patch
+Patch10:        imagick-fix-457-ensure-format-is-always-lowercase.patch
+BuildRequires:  %{php_name}-devel >= 7.0.1
 BuildRequires:  ImageMagick-devel >= 6.5.3.10
 BuildRequires:  ghostscript-fonts-std
-BuildRequires:  %{php_name}-devel >= 7.0.1
 BuildRequires:  re2c
 Requires:       php(api) = %{php_core_api}
 Requires:       php(zend-abi) = %{php_zend_api}