diff --git a/tests/test_coordinates.py b/tests/test_coordinates.py
index 1480917..eb4512c 100644
--- a/tests/test_coordinates.py
+++ b/tests/test_coordinates.py
@@ -299,9 +299,11 @@ def test_len(self):
         )
         assert len(InterpCoordinate(dict(tie_indices=[], tie_values=[]))) == 0
 
-    def test_repr(self):
-        # TODO
-        pass
+    @pytest.mark.parametrize("valid_input", valid)
+    def test_repr(self, valid_input):
+        coord = InterpCoordinate(data=valid_input)
+        my_coord = repr(coord)
+        assert isinstance(my_coord, str)
 
     def test_equals(self):
         coord1 = InterpCoordinate({"tie_indices": [0, 8], "tie_values": [100.0, 900.0]})
diff --git a/xdas/core/coordinates.py b/xdas/core/coordinates.py
index 57e6405..9df800d 100644
--- a/xdas/core/coordinates.py
+++ b/xdas/core/coordinates.py
@@ -620,6 +620,8 @@ def __repr__(self):
                 start = format_datetime(self.tie_values[0])
                 end = format_datetime(self.tie_values[-1])
                 return f"{start} to {end}"
+            else:
+                return f"{self.tie_values[0]} to {self.tie_values[-1]}"
 
     def __getitem__(self, item):
         if isinstance(item, slice):