diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
new file mode 100644
index 0000000..75dd804
--- /dev/null
+++ b/.github/workflows/unit_tests.yml
@@ -0,0 +1,29 @@
+name: Unit tests
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+    
+jobs:
+  code_style:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: conda-incubator/setup-miniconda@v2
+        with:
+          activate-environment: swe4s
+          environment-file: environment.yml
+      - run: pycodestyle $(git ls-files "*.py")
+      
+  unit_tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: |
+          cd test/unit
+          python -m unittest test_utils
diff --git a/environment.yml b/environment.yml
new file mode 100644
index 0000000..16abbdc
--- /dev/null
+++ b/environment.yml
@@ -0,0 +1,28 @@
+name: swe4s
+channels:
+  - conda-forge
+dependencies:
+  - _libgcc_mutex=0.1=conda_forge
+  - _openmp_mutex=4.5=2_gnu
+  - bzip2=1.0.8=h7f98852_4
+  - ca-certificates=2022.9.24=ha878542_0
+  - ld_impl_linux-64=2.36.1=hea4e1c9_2
+  - libffi=3.4.2=h7f98852_5
+  - libgcc-ng=12.1.0=h8d9b700_16
+  - libgomp=12.1.0=h8d9b700_16
+  - libnsl=2.0.0=h7f98852_0
+  - libsqlite=3.39.4=h753d276_0
+  - libuuid=2.32.1=h7f98852_1000
+  - libzlib=1.2.12=h166bdaf_4
+  - ncurses=6.3=h27087fc_1
+  - openssl=3.0.5=h166bdaf_2
+  - pip=22.2.2=pyhd8ed1ab_0
+  - pycodestyle=2.9.1=pyhd8ed1ab_0
+  - python=3.10.6=ha86cf86_0_cpython
+  - readline=8.1.2=h0f457ee_0
+  - setuptools=65.4.1=pyhd8ed1ab_0
+  - tk=8.6.12=h27826a3_0
+  - tzdata=2022d=h191b570_0
+  - wheel=0.37.1=pyhd8ed1ab_0
+  - xz=5.2.6=h166bdaf_0
+prefix: /home/jovyan/.conda/envs/swe4s
diff --git a/search.py b/search.py
index ebf90d7..716d040 100644
--- a/search.py
+++ b/search.py
@@ -32,8 +32,8 @@ def main():
         linear_search_total_time += toc - tic
 
     linear_search_mean_time = linear_search_total_time / args.num_searches
-    print('Linear search: ' \
-          + '{:.5f}'.format(linear_search_mean_time) \
+    print('Linear search: '
+          + '{:.5f}'.format(linear_search_mean_time)
           + ' seconds')
 
     tic = time.perf_counter()
@@ -42,8 +42,8 @@ def main():
 
     bsearch_idx_time = toc - tic
 
-    print('Indexing: ' \
-          + '{:.5f}'.format(bsearch_idx_time) \
+    print('Indexing: '
+          + '{:.5f}'.format(bsearch_idx_time)
           + ' seconds')
 
     bsearch_total_time = 0
@@ -55,11 +55,10 @@ def main():
         bsearch_total_time += toc - tic
 
     bsearch_mean_time = bsearch_total_time / args.num_searches
-    print('Binary search: ' \
-          + '{:.5f}'.format(bsearch_mean_time) \
+    print('Binary search: '
+          + '{:.5f}'.format(bsearch_mean_time)
           + ' seconds')
 
 
-
 if __name__ == '__main__':
     main()