diff --git a/html/semantics/forms/the-select-element/customizable-select/selectedcontent-mutations.html b/html/semantics/forms/the-select-element/customizable-select/selectedcontent-mutations.html
index 9b53b33ef194a6..1aadbd19f6854b 100644
--- a/html/semantics/forms/the-select-element/customizable-select/selectedcontent-mutations.html
+++ b/html/semantics/forms/the-select-element/customizable-select/selectedcontent-mutations.html
@@ -301,6 +301,7 @@
       "Type: childList | Target: selectedcontent | Added: [#text: \"\"] | After: selectedcontent",
       "Type: childList | Target: button | Added: [#text: \"\"] | After: selectedcontent",
       "Type: childList | Target: button | Added: [selectedcontent] | After: #text: \"\"",
+      "Type: childList | Target: selectedcontent | Removed: [#text: \"outer1\", selectedcontent, #text: \"\"]",
       "Type: childList | Target: selectedcontent | Added: [#text: \"outer2\"]",
       "Type: childList | Target: selectedcontent | Added: [selectedcontent] | After: #text: \"outer2\"",
       "Type: childList | Target: selectedcontent | Added: [#text: \"inner2\"]",
@@ -308,7 +309,6 @@
       "Type: childList | Target: button | Added: [#text: \"\"] | After: selectedcontent",
       "Type: childList | Target: select | Added: [#text: \"\"] | After: button",
       "Type: childList | Target: select | Added: [option] | After: #text: \"\"",
-      "Type: childList | Target: selectedcontent | Removed: [#text: \"outer1\", selectedcontent, #text: \"\"]",
       "Type: childList | Target: option | Added: [#text: \"option\"]",
       "Type: childList | Target: selectedcontent | Added: [#text: \"option\"]",
       "Type: childList | Target: select | Added: [#text: \"\"] | After: option",
@@ -347,9 +347,8 @@
       "Type: childList | Target: select | Added: [div] | After: #text: \"\"",
       "Type: childList | Target: div | Added: [#text: \"\"]",
       "Type: childList | Target: div | Added: [option] | After: #text: \"\"",
-      "Type: childList | Target: selectedcontent | Removed: [#text: \"one\"]",
       "Type: childList | Target: option | Added: [#text: \"two\"]",
-      "Type: childList | Target: selectedcontent | Added: [#text: \"two\"]",
+      "Type: childList | Target: selectedcontent | Added: [#text: \"two\"] | Removed: [#text: \"one\"]",
       "Type: childList | Target: div | Added: [#text: \"\"] | After: option",
       "Type: childList | Target: select | Added: [#text: \"\"] | After: div",
       "Type: childList | Target: div#test4 | Added: [#text: \"\"] | After: select"