diff --git a/lms/static/scripts/frontend_apps/components/BookPicker.tsx b/lms/static/scripts/frontend_apps/components/BookPicker.tsx
index a85d1db25c..3608ec4364 100644
--- a/lms/static/scripts/frontend_apps/components/BookPicker.tsx
+++ b/lms/static/scripts/frontend_apps/components/BookPicker.tsx
@@ -234,8 +234,9 @@ export default function BookPicker({
       )}
       // Opt out of Modal's automatic focus handling; route focus manually in
       // sub-components
-      initialFocus={'manual'}
+      initialFocus="manual"
       onClose={onCancel}
+      closeTitle="Close book dialog"
       scrollable={false}
       title={
         step === 'select-book'
diff --git a/lms/static/scripts/frontend_apps/components/JSTORPicker.tsx b/lms/static/scripts/frontend_apps/components/JSTORPicker.tsx
index faa61a4a3e..45880250ac 100644
--- a/lms/static/scripts/frontend_apps/components/JSTORPicker.tsx
+++ b/lms/static/scripts/frontend_apps/components/JSTORPicker.tsx
@@ -137,6 +137,7 @@ export default function JSTORPicker({
     <ModalDialog
       initialFocus={inputRef}
       onClose={onCancel}
+      closeTitle="Close JSTOR article dialog"
       scrollable={false}
       title="Select JSTOR article"
       size="lg"
diff --git a/lms/static/scripts/frontend_apps/components/LMSFilePicker.tsx b/lms/static/scripts/frontend_apps/components/LMSFilePicker.tsx
index f7b2294c55..f04b6f5643 100644
--- a/lms/static/scripts/frontend_apps/components/LMSFilePicker.tsx
+++ b/lms/static/scripts/frontend_apps/components/LMSFilePicker.tsx
@@ -400,6 +400,7 @@ export default function LMSFilePicker({
       })}
       title={`Select ${documentType}`}
       onClose={onCancel}
+      closeTitle="Close document dialog"
       size="lg"
       buttons={[
         <Button data-testid="cancel-button" key="cancel" onClick={onCancel}>
diff --git a/lms/static/scripts/frontend_apps/components/URLPicker.tsx b/lms/static/scripts/frontend_apps/components/URLPicker.tsx
index d02c5a5ba6..56b2a67feb 100644
--- a/lms/static/scripts/frontend_apps/components/URLPicker.tsx
+++ b/lms/static/scripts/frontend_apps/components/URLPicker.tsx
@@ -67,6 +67,7 @@ export default function URLPicker({
     <ModalDialog
       title="Enter URL"
       onClose={onCancel}
+      closeTitle="Close URL dialog"
       buttons={[
         <Button data-testid="cancel-button" key="cancel" onClick={onCancel}>
           Cancel
diff --git a/lms/static/scripts/frontend_apps/components/YouTubePicker.tsx b/lms/static/scripts/frontend_apps/components/YouTubePicker.tsx
index 9fdd95ba2d..cd63e4a167 100644
--- a/lms/static/scripts/frontend_apps/components/YouTubePicker.tsx
+++ b/lms/static/scripts/frontend_apps/components/YouTubePicker.tsx
@@ -102,6 +102,7 @@ export default function YouTubePicker({
     <ModalDialog
       title="Select YouTube video"
       onClose={onCancel}
+      closeTitle="Close YouTube dialog"
       initialFocus={inputRef}
       size="lg"
       scrollable={false}