Test extraction fails on timeout expression

The test extraction fails when the testsuite code includes a complex expression setting the timeout:

suite('Extension Test Suite', function () {
	this.timeout(
		// Both of these expressions cause an error in
		// the extraction of tests. Initially I thought
		// it was the use of 'Math' but the second expression
		// shows that it wasn't the issue.
		Math.max(5, this.timeout())
		// this.timeout() > 5 ? this.timeout() : 5
	);

The error is reported as a red node in the Test Explorer tree with the label: Cannot convert object to primitive value.

I couldn't find any useful logs in the output channels.

I created a reproducer here: https://github.com/microsoft/vscode-extension-samples/commit/ef56355782fdd7a225e6da39514c3e1af3b65b3d

Let me know if you need more info.

Thanks!

Start with the linked vscode-extension-samples reproducer and the test-extraction entry point, using the timeout expression shown in the issue. Trace why the expression produces “Cannot convert object to primitive value”; done means the tests are extracted without the red Test Explorer node or that error.