Later in 1842, Pasteur took the entrance test for the École Normale Supérieure. He passed the first set of tests, but because his ranking was low, Pasteur decided not to continue and try again next year. He went back to the Pension Barbet to prepare for the test. He also attended classes at the Lycée Saint-Louis and lectures of Jean-Baptiste Dumas at the Sorbonne. In 1843, he passed the test with a high ranking and entered the École Normale Supérieure. In 1845 he received the licencié ès sciences (Master of Science) degree. In 1846, he was appointed professor of physics at the Collège de Tournon (now called Lycée Gabriel-Faure [fr]) in Ardèche, but the chemist Antoine Jérôme Balard wanted him back at the École Normale Supérieure as a graduate laboratory assistant (agrégé préparateur). He joined Balard and simultaneously started his research in crystallography and in 1847, he submitted his two theses, one in chemistry and the other in physics.