Revert last changes and use a fixed seed.

theano/gpuarray/tests/test_linalg.py

@@ -212,13 +212,16 @@ class TestMagma(unittest.TestCase):
 
         fn = theano.function([A], gpu_matrix_inverse(A), mode=mode_with_gpu)
         N = 1000
-        A_val = rand(N, N).astype('float32')
+        test_rng = np.random.RandomState(seed=1)
+        # Copied from theano.tensor.tests.test_basic.rand.
+        A_val = test_rng.rand(N, N).astype('float32') * 2 - 1
         A_val_inv = fn(A_val)
         utt.assert_allclose(np.eye(N), np.dot(A_val_inv, A_val), atol=5e-3)
 
     def test_gpu_matrix_inverse_inplace(self):
         N = 1000
-        A_val_gpu = gpuarray_shared_constructor(rand(N, N).astype('float32'))
+        test_rng = np.random.RandomState(seed=1)
+        A_val_gpu = gpuarray_shared_constructor(test_rng.rand(N, N).astype('float32') * 2 - 1)
         A_val_copy = A_val_gpu.get_value()
         fn = theano.function([], GpuMagmaMatrixInverse(inplace=True)(A_val_gpu),
                              mode=mode_with_gpu, accept_inplace=True)