diff --git a/src/proxy-cssom.js b/src/proxy-cssom.js
index 33f9268..519d338 100644
--- a/src/proxy-cssom.js
+++ b/src/proxy-cssom.js
@@ -166,6 +166,10 @@ export function installCSSOM() {
       get value() {
         return  privateDetails.get(this).values[0];
       }
+
+      type() {
+        return this.value.type();
+      }
     },
 
     'CSSMathInvert': class extends CSSMathValue {
diff --git a/src/scroll-timeline-base.js b/src/scroll-timeline-base.js
index 195d1b8..9100a49 100644
--- a/src/scroll-timeline-base.js
+++ b/src/scroll-timeline-base.js
@@ -570,7 +570,7 @@ function getContainingBlock(element) {
 }
 
 export function getScrollParent(node) {
-  if (!node)
+  if (!node || !node.isConnected)
     return undefined;
 
   while (node = getContainingBlock(node)) {
@@ -718,7 +718,7 @@ function parseInset(value) {
 
   if (!value) return inset;
 
-  let parts = value;
+  let parts;
   // Parse string parts to
   if (typeof value === 'string') {
     parts = splitIntoComponentValues(value).map(str => {
@@ -731,6 +731,10 @@ function parseInset(value) {
         throw TypeError(`Could not parse inset "${value}"`);
       }
     });
+  } else if (Array.isArray(value)) {
+    parts = value;
+  } else {
+    parts = [value];
   }
   if (parts.length === 0 || parts.length > 2) {
     throw TypeError('Invalid inset');
diff --git a/test/expected.txt b/test/expected.txt
index d7913de..5544850 100644
--- a/test/expected.txt
+++ b/test/expected.txt
@@ -1052,7 +1052,7 @@ FAIL	/scroll-animations/view-timelines/timeline-offset-in-keyframe.html	String o
 PASS	/scroll-animations/view-timelines/timeline-offset-in-keyframe.html	Invalid timeline offset in programmatic keyframe throws
 FAIL	/scroll-animations/view-timelines/timeline-offset-in-keyframe.html	Timeline offsets in programmatic keyframes adjust for change in timeline
 FAIL	/scroll-animations/view-timelines/timeline-offset-in-keyframe.html	Timeline offsets in programmatic keyframes resolved when updating the animation effect
-FAIL	/scroll-animations/view-timelines/unattached-subject-inset.html	Creating a view timeline with a subject that is not attached to the document works as expected
+PASS	/scroll-animations/view-timelines/unattached-subject-inset.html	Creating a view timeline with a subject that is not attached to the document works as expected
 FAIL	/scroll-animations/view-timelines/view-timeline-get-current-time-range-name.html	View timeline current time for named range
 FAIL	/scroll-animations/view-timelines/view-timeline-get-set-range.html	Getting and setting the animation range
 PASS	/scroll-animations/view-timelines/view-timeline-inset.html	View timeline with px based inset.