diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-fetch-error-external-classic.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-fetch-error-external-classic.html.ini
new file mode 100644
index 000000000000..e21f8183cee3
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-fetch-error-external-classic.html.ini
@@ -0,0 +1,8 @@
+[after-prepare-createHTMLDocument-fetch-error-external-classic.html]
+  [<script> error: Move fetch-error external classic script to createHTMLDocument after-prepare]
+    expected:
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "linux") and webrender: PASS
+      if not debug and (os == "win"): PASS
+      FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-fetch-error-external-module.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-fetch-error-external-module.html.ini
new file mode 100644
index 000000000000..7c44f49985af
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-fetch-error-external-module.html.ini
@@ -0,0 +1,8 @@
+[after-prepare-createHTMLDocument-fetch-error-external-module.html]
+  [<script> error: Move fetch-error external module script to createHTMLDocument after-prepare]
+    expected:
+      if not debug and (os == "linux") and webrender: PASS
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "win"): PASS
+      FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-parse-error-external-classic.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-parse-error-external-classic.html.ini
new file mode 100644
index 000000000000..e6c210c7d8f5
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-parse-error-external-classic.html.ini
@@ -0,0 +1,8 @@
+[after-prepare-createHTMLDocument-parse-error-external-classic.html]
+  [window error: Move parse-error external classic script to createHTMLDocument after-prepare]
+    expected:
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "linux") and webrender: PASS
+      if not debug and (os == "win"): PASS
+      FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-parse-error-external-module.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-parse-error-external-module.html.ini
new file mode 100644
index 000000000000..1cfa9027a53a
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-parse-error-external-module.html.ini
@@ -0,0 +1,8 @@
+[after-prepare-createHTMLDocument-parse-error-external-module.html]
+  [window error: Move parse-error external module script to createHTMLDocument after-prepare]
+    expected:
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "linux") and webrender: PASS
+      if not debug and (os == "win"): PASS
+      FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-success-external-classic.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-success-external-classic.html.ini
new file mode 100644
index 000000000000..eb6ec7adb544
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-success-external-classic.html.ini
@@ -0,0 +1,8 @@
+[after-prepare-createHTMLDocument-success-external-classic.html]
+  [Eval: Move success external classic script to createHTMLDocument after-prepare]
+    expected:
+      if not debug and (os == "linux") and webrender: PASS
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "win"): PASS
+      FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-success-external-module.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-success-external-module.html.ini
new file mode 100644
index 000000000000..cfdab3be7620
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-createHTMLDocument-success-external-module.html.ini
@@ -0,0 +1,8 @@
+[after-prepare-createHTMLDocument-success-external-module.html]
+  [Eval: Move success external module script to createHTMLDocument after-prepare]
+    expected:
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "linux") and webrender: PASS
+      if not debug and (os == "win"): PASS
+      FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-fetch-error-external-classic.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-fetch-error-external-classic.html.ini
new file mode 100644
index 000000000000..f072530a936c
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-fetch-error-external-classic.html.ini
@@ -0,0 +1,4 @@
+[after-prepare-iframe-fetch-error-external-classic.html]
+  [<script> error: Move fetch-error external classic script to iframe after-prepare]
+    expected: FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-fetch-error-external-module.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-fetch-error-external-module.html.ini
new file mode 100644
index 000000000000..d7ea9e6372a7
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-fetch-error-external-module.html.ini
@@ -0,0 +1,4 @@
+[after-prepare-iframe-fetch-error-external-module.html]
+  [<script> error: Move fetch-error external module script to iframe after-prepare]
+    expected: FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-parse-error-external-classic.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-parse-error-external-classic.html.ini
new file mode 100644
index 000000000000..229ac5dbd099
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-parse-error-external-classic.html.ini
@@ -0,0 +1,14 @@
+[after-prepare-iframe-parse-error-external-classic.html]
+  [window error: Move parse-error external classic script to iframe after-prepare]
+    expected:
+      if not debug and (os == "linux") and webrender: PASS
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "win"): PASS
+      FAIL
+
+  [<script> error: Move parse-error external classic script to iframe after-prepare]
+    expected:
+      if not debug and (os == "linux") and webrender: FAIL
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "win"): FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-parse-error-external-module.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-parse-error-external-module.html.ini
new file mode 100644
index 000000000000..1fffc3d04395
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-parse-error-external-module.html.ini
@@ -0,0 +1,14 @@
+[after-prepare-iframe-parse-error-external-module.html]
+  [<script> error: Move parse-error external module script to iframe after-prepare]
+    expected:
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "linux") and webrender: FAIL
+      if not debug and (os == "win"): FAIL
+
+  [window error: Move parse-error external module script to iframe after-prepare]
+    expected:
+      if not debug and (os == "linux") and webrender: PASS
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "win"): PASS
+      FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-parse-error-inline-classic.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-parse-error-inline-classic.html.ini
new file mode 100644
index 000000000000..d8961d4fceb2
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-parse-error-inline-classic.html.ini
@@ -0,0 +1,8 @@
+[after-prepare-iframe-parse-error-inline-classic.html]
+  [window error: Move parse-error inline classic script to iframe after-prepare]
+    expected:
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "linux") and webrender: PASS
+      if not debug and (os == "win"): PASS
+      FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-success-external-classic.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-success-external-classic.html.ini
new file mode 100644
index 000000000000..2bf185687bc8
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-success-external-classic.html.ini
@@ -0,0 +1,14 @@
+[after-prepare-iframe-success-external-classic.html]
+  [<script> error: Move success external classic script to iframe after-prepare]
+    expected:
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "linux") and webrender: FAIL
+      if not debug and (os == "win"): FAIL
+
+  [Eval: Move success external classic script to iframe after-prepare]
+    expected:
+      if not debug and (os == "linux") and webrender: PASS
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "win"): PASS
+      FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-success-external-module.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-success-external-module.html.ini
new file mode 100644
index 000000000000..5196187f1b62
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-success-external-module.html.ini
@@ -0,0 +1,14 @@
+[after-prepare-iframe-success-external-module.html]
+  [Eval: Move success external module script to iframe after-prepare]
+    expected:
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "linux") and webrender: PASS
+      if not debug and (os == "win"): PASS
+      FAIL
+
+  [<script> error: Move success external module script to iframe after-prepare]
+    expected:
+      if not debug and (os == "linux") and webrender: FAIL
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "win"): FAIL
+
diff --git a/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-success-inline-classic.html.ini b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-success-inline-classic.html.ini
new file mode 100644
index 000000000000..1ff0b4348d77
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/scripting-1/the-script-element/moving-between-documents/after-prepare-iframe-success-inline-classic.html.ini
@@ -0,0 +1,8 @@
+[after-prepare-iframe-success-inline-classic.html]
+  [Eval: Move success inline classic script to iframe after-prepare]
+    expected:
+      if not debug and (os == "linux") and webrender: PASS
+      if not debug and (os == "linux") and not webrender: ["PASS", "FAIL"]
+      if not debug and (os == "win"): PASS
+      FAIL
+