diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6599fd7e55..7c4255af8e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -124,6 +124,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
     * Added RPC and Sharded plugins ([#5732](https://github.com/PyTorchLightning/pytorch-lightning/pull/5732))
     * Added missing `LightningModule`-wrapper logic to new plugins and accelerator ([#5734](https://github.com/PyTorchLightning/pytorch-lightning/pull/5734))
 
+
+- Increased TPU check timeout from 20s to 100s ([#5598](https://github.com/PyTorchLightning/pytorch-lightning/pull/5598))
+
+
 ### Deprecated
 
 - Function `stat_scores_multiple_classes` is deprecated in favor of `stat_scores` ([#4839](https://github.com/PyTorchLightning/pytorch-lightning/pull/4839))
@@ -172,12 +176,6 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Fixed loading yaml ([#5619](https://github.com/PyTorchLightning/pytorch-lightning/pull/5619))
 
 
-## [1.1.5] - 2021-01-19
-
-### Fixed
-
-
-
 ## [1.1.5] - 2021-01-19
 
 ### Fixed
diff --git a/pytorch_lightning/utilities/xla_device.py b/pytorch_lightning/utilities/xla_device.py
index 210047c466..fcf56e9c67 100644
--- a/pytorch_lightning/utilities/xla_device.py
+++ b/pytorch_lightning/utilities/xla_device.py
@@ -22,6 +22,8 @@ from pytorch_lightning.utilities.imports import _XLA_AVAILABLE
 
 if _XLA_AVAILABLE:
     import torch_xla.core.xla_model as xm
+#: define waiting time got checking TPU available in sec
+TPU_CHECK_TIMEOUT = 100
 
 
 def inner_f(queue, func, *args, **kwargs):  # pragma: no cover
@@ -40,7 +42,7 @@ def pl_multi_process(func):
         queue = Queue()
         proc = Process(target=inner_f, args=(queue, func, *args), kwargs=kwargs)
         proc.start()
-        proc.join(20)
+        proc.join(TPU_CHECK_TIMEOUT)
         try:
             return queue.get_nowait()
         except q.Empty:
diff --git a/pytorch_lightning/utilities/xla_device_utils.py b/pytorch_lightning/utilities/xla_device_utils.py
index 20b7a04e7b..aa0af1697a 100644
--- a/pytorch_lightning/utilities/xla_device_utils.py
+++ b/pytorch_lightning/utilities/xla_device_utils.py
@@ -1,3 +1,16 @@
+# Copyright The PyTorch Lightning team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 from warnings import warn
 
 warn(
diff --git a/tests/utilities/test_xla_device_utils.py b/tests/utilities/test_xla_device_utils.py
index c0349fff46..dcafa85092 100644
--- a/tests/utilities/test_xla_device_utils.py
+++ b/tests/utilities/test_xla_device_utils.py
@@ -12,17 +12,17 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import time
+from unittest.mock import patch
 
 import pytest
 
 import pytorch_lightning.utilities.xla_device as xla_utils
-from pytorch_lightning.utilities import _TPU_AVAILABLE, _XLA_AVAILABLE
+from pytorch_lightning.utilities import _TPU_AVAILABLE
+from pytorch_lightning.utilities import _XLA_AVAILABLE
 from tests.base.develop_utils import pl_multi_process_test
 
 
-# lets hope that in or env we have installed XLA only for TPU devices, otherwise,
-#  it is testing in the cycle "if I am true test that I am true :D"
-@pytest.mark.skipif(_XLA_AVAILABLE, reason="test requires torch_xla to be absent")
+@pytest.mark.skipif(XLA_AVAILABLE, reason="test requires torch_xla to be absent")
 def test_tpu_device_absence():
     """Check tpu_device_exists returns None when torch_xla is not available"""
     assert xla_utils.XLADeviceUtils.tpu_device_exists() is None
@@ -35,12 +35,12 @@ def test_tpu_device_presence():
     assert xla_utils.XLADeviceUtils.tpu_device_exists() is True
 
 
-def test_result_returns_within_20_seconds():
+@patch('pytorch_lightning.utilities.xla_device_utils.TPU_CHECK_TIMEOUT', 10)
+def test_result_returns_within_timeout_seconds():
     """Check that pl_multi_process returns within 10 seconds"""
-
     start = time.time()
-    result = xla_utils.pl_multi_process(time.sleep)(25)
+    result = xla_utils.pl_multi_process(time.sleep)(xla_utils.TPU_CHECK_TIMEOUT * 1.25)
     end = time.time()
     elapsed_time = int(end - start)
-    assert elapsed_time <= 20
+    assert elapsed_time <= xla_utils.TPU_CHECK_TIMEOUT
     assert result is False