diff --git a/.travis.yml b/.travis.yml
index 2c8533d02ddc1..98826a2d9e115 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,6 +27,11 @@ matrix:
   fast_finish: true
 
   include:
+    # In allowed failures
+    - dist: bionic
+      python: 3.9-dev
+      env:
+        - JOB="3.9-dev" PATTERN="(not slow and not network and not clipboard)"
     - env:
         - JOB="3.8" ENV_FILE="ci/deps/travis-38.yaml" PATTERN="(not slow and not network and not clipboard)"
 
@@ -53,6 +58,11 @@ matrix:
       services:
         - mysql
         - postgresql
+  allow_failures:
+  - dist: bionic
+    python: 3.9-dev
+    env:
+        - JOB="3.9-dev" PATTERN="(not slow and not network)"
 
 before_install:
   - echo "before_install"
@@ -83,7 +93,7 @@ install:
 script:
   - echo "script start"
   - echo "$JOB"
-  - source activate pandas-dev
+  - if [ "$JOB" != "3.9-dev" ]; then source activate pandas-dev; fi
   - ci/run_tests.sh
 
 after_script:
diff --git a/ci/build39.sh b/ci/build39.sh
new file mode 100755
index 0000000000000..f85e1c7def206
--- /dev/null
+++ b/ci/build39.sh
@@ -0,0 +1,21 @@
+#!/bin/bash -e
+# Special build for python3.9 until numpy puts its own wheels up
+
+sudo apt-get install build-essential gcc xvfb
+pip install --no-deps -U pip wheel setuptools
+pip install python-dateutil pytz pytest pytest-xdist hypothesis
+pip install cython --pre # https://github.com/cython/cython/issues/3395
+
+git clone https://github.com/numpy/numpy
+cd numpy
+python setup.py build_ext --inplace
+python setup.py install
+cd ..
+rm -rf numpy
+
+python setup.py build_ext -inplace
+python -m pip install --no-build-isolation -e .
+
+python -c "import sys; print(sys.version_info)"
+python -c "import pandas as pd"
+python -c "import hypothesis"
diff --git a/ci/setup_env.sh b/ci/setup_env.sh
index 16bbd7693da37..76f47b7ed3634 100755
--- a/ci/setup_env.sh
+++ b/ci/setup_env.sh
@@ -1,5 +1,10 @@
 #!/bin/bash -e
 
+if [ "$JOB" == "3.9-dev" ]; then
+    /bin/bash ci/build39.sh
+    exit 0
+fi
+
 # edit the locale file if needed
 if [[ "$(uname)" == "Linux" && -n "$LC_ALL" ]]; then
     echo "Adding locale to the first line of pandas/__init__.py"
diff --git a/pandas/compat/__init__.py b/pandas/compat/__init__.py
index 6570e0782a69a..f7bb73b916ce0 100644
--- a/pandas/compat/__init__.py
+++ b/pandas/compat/__init__.py
@@ -16,6 +16,7 @@
 
 PY37 = sys.version_info >= (3, 7)
 PY38 = sys.version_info >= (3, 8)
+PY39 = sys.version_info >= (3, 9)
 PYPY = platform.python_implementation() == "PyPy"
 
 
diff --git a/pandas/tests/scalar/timedelta/test_arithmetic.py b/pandas/tests/scalar/timedelta/test_arithmetic.py
index 2d86ce275de7c..2114962cfc0bd 100644
--- a/pandas/tests/scalar/timedelta/test_arithmetic.py
+++ b/pandas/tests/scalar/timedelta/test_arithmetic.py
@@ -8,7 +8,7 @@
 import pytest
 
 import pandas as pd
-from pandas import NaT, Timedelta, Timestamp, _is_numpy_dev, offsets
+from pandas import NaT, Timedelta, Timestamp, _is_numpy_dev, compat, offsets
 import pandas._testing as tm
 from pandas.core import ops
 
@@ -422,7 +422,8 @@ def test_td_div_numeric_scalar(self):
             pytest.param(
                 np.float64("NaN"),
                 marks=pytest.mark.xfail(
-                    _is_numpy_dev,
+                    # Works on numpy dev only in python 3.9
+                    _is_numpy_dev and not compat.PY39,
                     raises=RuntimeWarning,
                     reason="https://github.com/pandas-dev/pandas/issues/31992",
                 ),