diff --git a/devtools/client/accessibility/test/browser/browser.ini b/devtools/client/accessibility/test/browser/browser.ini
index 1952081e1f12..ed8e9f0d08ec 100644
--- a/devtools/client/accessibility/test/browser/browser.ini
+++ b/devtools/client/accessibility/test/browser/browser.ini
@@ -15,6 +15,7 @@ support-files =
 [browser_accessibility_mutations.js]
 [browser_accessibility_panel_highlighter.js]
 [browser_accessibility_panel_highlighter_multi_tab.js]
+skip-if = (os == 'linux' && debug && bits == 64) # Bug 1511247
 [browser_accessibility_relation_navigation.js]
 [browser_accessibility_reload.js]
 [browser_accessibility_sidebar.js]