diff --git a/lib/matplotlib/scale.py b/lib/matplotlib/scale.py
index a63ef7c485d8..9010e15a6f6a 100644
--- a/lib/matplotlib/scale.py
+++ b/lib/matplotlib/scale.py
@@ -327,6 +327,9 @@ def inverted(self):
         return InvertedSymmetricalLogTransform(self.base, self.linthresh,
                                                self.linscale)
 
+    def __str__(self):
+        return "{}".format(type(self).__name__)
+
 
 class InvertedSymmetricalLogTransform(Transform):
     input_dims = 1
@@ -359,6 +362,9 @@ def inverted(self):
         return SymmetricalLogTransform(self.base,
                                        self.linthresh, self.linscale)
 
+    def __str__(self):
+        return "{}".format(type(self).__name__)
+
 
 class SymmetricalLogScale(ScaleBase):
     """