diff --git a/plugins/inlineStyles.js b/plugins/inlineStyles.js
index e931b5f68..6b5174d1c 100644
--- a/plugins/inlineStyles.js
+++ b/plugins/inlineStyles.js
@@ -252,7 +252,7 @@ exports.fn = (root, params) => {
             csstree.walk(styleDeclarationList, {
               visit: 'Declaration',
               enter(node, item) {
-                styleDeclarationItems.set(node.property, item);
+                styleDeclarationItems.set(node.property.toLowerCase(), item);
               },
             });
             // merge declarations
diff --git a/test/regression.js b/test/regression.js
index 65fc3ba4e..9a8f445c8 100644
--- a/test/regression.js
+++ b/test/regression.js
@@ -38,8 +38,6 @@ const runTests = async ({ list }) => {
       name === 'w3c-svg-11-test-suite/svg/filters-composite-05-f.svg' ||
       // removing wrapping <g> breaks :first-child pseudo-class
       name === 'w3c-svg-11-test-suite/svg/styling-pres-04-f.svg' ||
-      // messed case insensitivity while inlining styles
-      name === 'w3c-svg-11-test-suite/svg/styling-css-10-f.svg' ||
       // rect is converted to path which matches wrong styles
       name === 'w3c-svg-11-test-suite/svg/styling-css-08-f.svg' ||
       // external image