diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..1bd773e
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,40 @@
+# This workflow will install Python dependencies, run tests and lint for Python 3.9
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: Test
+
+on:
+  push:
+    branches: [ develop ]
+  pull_request:
+    branches: [ develop ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.9"]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install flake8
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+    - name: Lint with flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+    - name: Test with nosetests
+      run: |
+        nosetests --verbosity=2
diff --git a/CreateVariableFiles.py b/CreateVariableFiles.py
index f8bbc35..42303ec 100644
--- a/CreateVariableFiles.py
+++ b/CreateVariableFiles.py
@@ -1,7 +1,7 @@
 import os
 
 
-variable_name = raw_input("Enter the name of the variable:")
+variable_name = input("Enter the name of the variable:")
 
 #write variable file
 var_filename = "%s.py"%(variable_name)
diff --git a/gwlfe/DailyArrayConverter.py b/gwlfe/DailyArrayConverter.py
index 4e6709c..cf48e64 100644
--- a/gwlfe/DailyArrayConverter.py
+++ b/gwlfe/DailyArrayConverter.py
@@ -1,5 +1,6 @@
 import random
 
+import numpy as np
 import numpy.ma as ma
 # from numba import jit
 from numpy import array
@@ -63,7 +64,7 @@
 
 
 def mask_builder(DaysMonth):
-    ones = ravel(ones((12, 31))).astype("int")
+    ones = ravel(np.ones((12, 31))).astype("int")
     slices = []
     for i, month in enumerate(DaysMonth[0]):
         slices.append(slice(31 * i, 31 * i + month))