I have results from two very sensitive but different lab test trying to find pathogen in a patient sample. For some patients, results from two test are not identical (listed below).

What statistical test to perform to find out the odds that the difference observed between two test is due to chance?

Patient ID Test1 Test2

1 Pos. Neg.

2 Pos. Neg.

3 Pos. Pos.

4 Pos. Neg.

5 Neg. Pos.

6 Pos. Neg.

7 Neg. Neg.

8 Neg. Neg.

9 Neg. Neg.

10 Neg. Neg.

11 Neg. Pos.

12 Pos. Pos.

13 Pos. Neg.

14 Pos. Pos.

15 Pos. Neg.

16 Neg. Neg.

17 Pos. Pos.

18 Pos. Neg.

19 Pos. Neg.

Thanks