diff --git a/devtools/client/accessibility/test/browser/browser.ini b/devtools/client/accessibility/test/browser/browser.ini
index f1d8f80a9417..51eb25d7c0cb 100644
--- a/devtools/client/accessibility/test/browser/browser.ini
+++ b/devtools/client/accessibility/test/browser/browser.ini
@@ -15,6 +15,7 @@ skip-if = (os == 'win' && processor == 'aarch64') # bug 1533184
 [browser_accessibility_context_menu_inspector.js]
 skip-if = (os == 'win' && processor == 'aarch64') # bug 1533484
 [browser_accessibility_fission_switch_target.js]
+skip-if = (os == 'linux' && asan) # bug 1666940
 [browser_accessibility_mutations.js]
 skip-if = (os == 'win' && processor == 'aarch64') # bug 1533534
 [browser_accessibility_panel_audit_oop.js]