diff --git a/extensions/typescript-language-features/src/languageFeatures/completions.ts b/extensions/typescript-language-features/src/languageFeatures/completions.ts
index fcc5dc64c6f..8b5100f876e 100644
--- a/extensions/typescript-language-features/src/languageFeatures/completions.ts
+++ b/extensions/typescript-language-features/src/languageFeatures/completions.ts
@@ -93,7 +93,6 @@ class MyCompletionItem extends vscode.CompletionItem {
 		this.range = this.getRangeFromReplacementSpan(tsEntry, completionContext);
 		this.commitCharacters = MyCompletionItem.getCommitCharacters(completionContext, tsEntry);
 		this.insertText = isSnippet && tsEntry.insertText ? new vscode.SnippetString(tsEntry.insertText) : tsEntry.insertText;
-		// @ts-expect-error until 5.2
 		this.filterText = tsEntry.filterText || this.getFilterText(completionContext.line, tsEntry.insertText);
 
 		if (completionContext.isMemberCompletion && completionContext.dotAccessorContext && !(this.insertText instanceof vscode.SnippetString)) {
diff --git a/package.json b/package.json
index 4779e1200e8..0a6957a0fa6 100644
--- a/package.json
+++ b/package.json
@@ -204,7 +204,7 @@
     "ts-loader": "^9.4.2",
     "ts-node": "^10.9.1",
     "tsec": "0.1.4",
-    "typescript": "^5.2.0-dev.20230516",
+    "typescript": "^5.2.0-dev.20230524",
     "typescript-formatter": "7.1.0",
     "underscore": "^1.12.1",
     "util": "^0.12.4",
diff --git a/src/vs/workbench/services/textfile/browser/textFileService.ts b/src/vs/workbench/services/textfile/browser/textFileService.ts
index 6920a263671..bebdacc22ba 100644
--- a/src/vs/workbench/services/textfile/browser/textFileService.ts
+++ b/src/vs/workbench/services/textfile/browser/textFileService.ts
@@ -507,7 +507,7 @@ export abstract class AbstractTextFileService extends Disposable implements ITex
 		let sourceTextModel: ITextModel | undefined = undefined;
 		if (sourceModel instanceof BaseTextEditorModel) {
 			if (sourceModel.isResolved()) {
-				sourceTextModel = sourceModel.textEditorModel;
+				sourceTextModel = withNullAsUndefined(sourceModel.textEditorModel);
 			}
 		} else {
 			sourceTextModel = sourceModel as ITextModel;
diff --git a/yarn.lock b/yarn.lock
index ed38da917db..b4adddd0a59 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9782,10 +9782,10 @@ typescript@^4.7.4:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.8.4.tgz#c464abca159669597be5f96b8943500b238e60e6"
   integrity sha512-QCh+85mCy+h0IGff8r5XWzOVSbBO+KfeYrMQh7NJ58QujwcE22u+NUSmUxqF+un70P9GXKxa2HCNiTTMJknyjQ==
 
-typescript@^5.2.0-dev.20230516:
-  version "5.2.0-dev.20230516"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.2.0-dev.20230516.tgz#9dc4d02c031cdf311ddb6ee646be09d5f13de4c9"
-  integrity sha512-DGK8md4PQgA6QG9JnvC6LecNnBstc1h6zrg71isrlZTsRFVl3EsID6D2Exrh4ULbxynA61PE13M+uOmLFWOu4w==
+typescript@^5.2.0-dev.20230524:
+  version "5.2.0-dev.20230524"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.2.0-dev.20230524.tgz#c2714b82f5ef8c63328a253692ae0b8c244c86d6"
+  integrity sha512-1XzSUJCt31jm7jIZ3vBKzK46ZxnmqX2VdVg/dur9AIaz9WmidrABs7F8H8d4onpIV8RYD/L6xW6MXR5EHjl+LA==
 
 typical@^4.0.0:
   version "4.0.0"