diff --git a/frontend/obsidian-plugin/jest.config.js b/frontend/obsidian-plugin/jest.config.js
index 8c1027ee..d1cbaca2 100644
--- a/frontend/obsidian-plugin/jest.config.js
+++ b/frontend/obsidian-plugin/jest.config.js
@@ -1,3 +1,3 @@
 module.exports = {
-	preset: "ts-jest/presets/js-with-babel-esm"
+	preset: "ts-jest"
 };
diff --git a/frontend/obsidian-plugin/src/obsidian-file-system.ts b/frontend/obsidian-plugin/src/obsidian-file-system.ts
index a3951991..1129ac55 100644
--- a/frontend/obsidian-plugin/src/obsidian-file-system.ts
+++ b/frontend/obsidian-plugin/src/obsidian-file-system.ts
@@ -106,10 +106,9 @@ export class ObsidianFileSystemOperations implements FileSystemOperations {
 			view.editor.setValue(result.text);
 
 			const selections = [];
-			const resultCursors = result.cursors ?? [];
-			for (let i = 0; i < resultCursors.length / 2; i++) {
-				const from = resultCursors[2 * i];
-				const to = resultCursors[2 * i + 1];
+			for (let i = 0; i < result.cursors.length / 2; i++) {
+				const from = result.cursors[2 * i];
+				const to = result.cursors[2 * i + 1];
 				const { line: fromLine, column: fromColumn } =
 					positionToLineAndColumn(result.text, from.position);
 
diff --git a/frontend/sync-client/jest.config.js b/frontend/sync-client/jest.config.js
index 8c1027ee..d1cbaca2 100644
--- a/frontend/sync-client/jest.config.js
+++ b/frontend/sync-client/jest.config.js
@@ -1,3 +1,3 @@
 module.exports = {
-	preset: "ts-jest/presets/js-with-babel-esm"
+	preset: "ts-jest"
 };
diff --git a/frontend/sync-client/package.json b/frontend/sync-client/package.json
index 82b5dfbe..8128d4de 100644
--- a/frontend/sync-client/package.json
+++ b/frontend/sync-client/package.json
@@ -10,7 +10,7 @@
     "scripts": {
         "dev": "webpack watch --mode development",
         "build": "webpack --mode production",
-        "test": "NODE_OPTIONS=\"$NODE_OPTIONS --experimental-vm-modules\" jest"
+        "test": "jest"
     },
     "dependencies": {
         "byte-base64": "^1.1.0",
@@ -32,4 +32,4 @@
         "webpack-merge": "^6.0.1",
         "ws": "^8.18.2"
     }
-}
+}
\ No newline at end of file
diff --git a/frontend/sync-client/src/utils/assert-set-contains-exactly.ts b/frontend/sync-client/src/utils/assert-set-contains-exactly.ts
index 9682044e..0532a3d3 100644
--- a/frontend/sync-client/src/utils/assert-set-contains-exactly.ts
+++ b/frontend/sync-client/src/utils/assert-set-contains-exactly.ts
@@ -1,4 +1,4 @@
-import assert from "assert";
+import * as assert from "assert";
 
 export function assertSetContainsExactly<T>(set: Set<T>, ...values: T[]): void {
 	assert(
diff --git a/frontend/test-client/jest.config.js b/frontend/test-client/jest.config.js
index 8c1027ee..d1cbaca2 100644
--- a/frontend/test-client/jest.config.js
+++ b/frontend/test-client/jest.config.js
@@ -1,3 +1,3 @@
 module.exports = {
-	preset: "ts-jest/presets/js-with-babel-esm"
+	preset: "ts-jest"
 };