}

			// Change SA token
			if len(c.saNewFilename) > 0 {
				t.Log("Expecting detect changes to the SA token")
				if err := file.AtomicCopy(filepath.Join("testdata", c.saNewFilename), tempDir, c.saFilename); err != nil {
					t.Fatal(err)
				}

				select {
				case err := <-errChan:
					if err != nil {
						// A change in SA token should return nil
						t.Fatal(err)
					}