tests: fix e2e tests

tests/specs/oidc.spec.ts

@@ -189,6 +189,19 @@ test('Refresh token fails when used for the wrong client', async ({ request }) =
 		})
 		.then((r) => r.text());
 
+	// Perform the exchange
+	const refreshResponse = await request.post('/api/oidc/token', {
+		headers: {
+			'Content-Type': 'application/x-www-form-urlencoded'
+		},
+		form: {
+			grant_type: 'refresh_token',
+			client_id: clientId,
+			refresh_token: refreshToken,
+			client_secret: clientSecret
+		}
+	});
+
 	expect(refreshResponse.status()).toBe(400);
 });