test: Clean up three tests

Removes a print statement, uses random seeds to speed up re-running
tests.

tests/test_basic_bernoulli.py

@@ -95,6 +95,4 @@ def test_bernoulli_random_seed_same():
 
 def test_bernoulli_random_seed_different(posterior):
     fits = [stan.build(program_code, data=data, random_seed=seed).sample() for seed in (1, 2)]
-    for i, fit in enumerate(fits):
-        print(i, fit["theta"].ravel()[:10])
     assert not np.allclose(*[fit["theta"] for fit in fits])

tests/test_corr_matrix.py

@@ -16,7 +16,7 @@ def test_corr_matrix_build():
 
 def test_corr_matrix_sample():
     """Sample from a simple model."""
-    posterior = stan.build(program_code)
+    posterior = stan.build(program_code, random_seed=1)
     fit = posterior.sample(num_chains=2, num_samples=50)
     df = fit.to_frame()
     assert len(df["Lambda.1.1"]) == 100

tests/test_linear_regression.py

@@ -32,7 +32,7 @@
 
 @pytest.fixture(scope="module")
 def posterior():
-    return stan.build(program_code, data=data)
+    return stan.build(program_code, data=data, random_seed=1)
 
 
 def test_linear_regression(posterior):