diff --git a/graphslam/edge/base_edge.py b/graphslam/edge/base_edge.py
index 3dc2330..c41e4eb 100644
--- a/graphslam/edge/base_edge.py
+++ b/graphslam/edge/base_edge.py
@@ -175,7 +175,7 @@ def plot(self, color=''):
         raise NotImplementedError
 
     def approx_equal(self, other, tol=1e-6):
-        """Check whether two poses edges approximately equal.
+        """Check whether two edges are approximately equal.
 
         Parameters
         ----------
diff --git a/graphslam/graph.py b/graphslam/graph.py
index e2826b0..6434780 100644
--- a/graphslam/graph.py
+++ b/graphslam/graph.py
@@ -350,7 +350,7 @@ def plot(self, vertex_color='r', vertex_marker='o', vertex_markersize=3, edge_co
         plt.show()
 
     def approx_equal(self, other, tol=1e-6):
-        """Check whether two graphs are (approximately) equal.
+        """Check whether two graphs are approximately equal.
 
         Parameters
         ----------
diff --git a/tests/test_base_edge.py b/tests/test_base_edge.py
index f09d369..f22bf8a 100644
--- a/tests/test_base_edge.py
+++ b/tests/test_base_edge.py
@@ -128,9 +128,7 @@ def test_plot(self):
             e.plot()
 
     def test_approx_equal(self):
-        """Test that the ``approx_equal`` method works as expected.
-
-        """
+        """Test that the ``approx_equal`` method works as expected."""
         p1 = PoseR2([1, 2])
         p2 = PoseR2([3, 4])
         estimate = PoseR2([0, 0])