diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 04d10b5..07d05f9 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -1,7 +1,7 @@
 name: Lint
 on:
-  push: { branches: [ "master" ] }
-  pull_request: { branches: [ "master" ] }
+  push: { branches: [ "main" ] }
+  pull_request: { branches: [ "main" ] }
 
 concurrency:
   group: lint-${{ github.ref }}
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f225e37..ab2de1b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,7 +1,7 @@
 name: Test
 on:
-  push: { branches: [ "master" ] }
-  pull_request: { branches: [ "master" ] }
+  push: { branches: [ "main" ] }
+  pull_request: { branches: [ "main" ] }
 
 concurrency:
   group: test-${{ github.ref }}
diff --git a/ec_tools/semi_integration.py b/ec_tools/semi_integration.py
index 322cd4c..4777f9c 100644
--- a/ec_tools/semi_integration.py
+++ b/ec_tools/semi_integration.py
@@ -48,14 +48,14 @@ def semi_integration(y, q=-0.5, delta_x=1, c1=8, c2=2):
     TEST:
     >>> from scipy.integrate import cumulative_trapezoid
     >>> x = np.linspace(0,1000, 1001)
-    >>> Δx = x[1] - x[0]
+    >>> delta_x = x[1] - x[0]
     >>> y = np.array([1]*1001)
-    >>> np.allclose(semi_integration(semi_integration(y, delta_x=Δx), Δx=Δx), cumulative_trapezoid(y,x,initial=0), rtol=2.5e-03)
+    >>> np.allclose(semi_integration(semi_integration(y, delta_x=delta_x), delta_x=delta_x), cumulative_trapezoid(y,x,initial=0), rtol=2.5e-03)
     True
     >>> x = np.linspace(0,1000, 10001)
-    >>> Δx = x[1] - x[0]
+    >>> delta_x = x[1] - x[0]
     >>> y = np.array([1]*10001)
-    >>> np.allclose(semi_integration(semi_integration(y, delta_x=Δx), Δx=Δx), cumulative_trapezoid(y,x,initial=0), rtol=5e-03)
+    >>> np.allclose(semi_integration(semi_integration(y, delta_x=delta_x), delta_x=delta_x), cumulative_trapezoid(y,x,initial=0), rtol=5e-03)
     True
     """
     N = y.size
diff --git a/environment.yml b/environment.yml
index 7a2bd7e..d354956 100644
--- a/environment.yml
+++ b/environment.yml
@@ -10,3 +10,4 @@ dependencies:
   - pylint
   - pytest
   - pytest-doctestplus
+  - scipy