diff --git a/earwigbot/wiki/copyvios/__init__.py b/earwigbot/wiki/copyvios/__init__.py
index 30d4681..f85ab22 100644
--- a/earwigbot/wiki/copyvios/__init__.py
+++ b/earwigbot/wiki/copyvios/__init__.py
@@ -48,8 +48,15 @@ class CopyvioCheckResult(object):
         self.delta_chain = chains[1]
 
     def __repr__(self):
-        r = "CopyvioCheckResult(violation={0!r}, confidence={1!r}, url={2!r}, queries={3|r})"
-        return r.format(self.violation, self.confidence, self.url, self.queries)
+        """Return the canonical string representation of the result."""
+        res = "CopyvioCheckResult(violation={0!r}, confidence={1!r}, url={2!r}, queries={3|r})"
+        return res.format(self.violation, self.confidence, self.url,
+                          self.queries)
+
+    def __str__(self):
+        """Return a nice string representation of the result."""
+        res = "<CopyvioCheckResult ({0} with {1} conf)>"
+        return res.format(self.violation, self.confidence)
 
 
 class CopyvioMixIn(object):
diff --git a/earwigbot/wiki/copyvios/markov.py b/earwigbot/wiki/copyvios/markov.py
index 74783d0..081469f 100644
--- a/earwigbot/wiki/copyvios/markov.py
+++ b/earwigbot/wiki/copyvios/markov.py
@@ -42,6 +42,14 @@ class MarkovChain(object):
         except KeyError:
             pass
 
+    def __repr__(self):
+        """Return the canonical string representation of the MarkovChain."""
+        return "MarkovChain(text={0!r})".format(self.text)
+
+    def __str__(self):
+        """Return a nice string representation of the MarkovChain."""
+        return "<MarkovChain of size {0}>".format(self.size())
+
     def size(self):
         count = 0
         for node in self.chain.itervalues():
@@ -53,6 +61,7 @@ class MarkovChain(object):
 class MarkovChainIntersection(MarkovChain):
     def __init__(self, mc1, mc2):
         self.chain = defaultdict(lambda: defaultdict(lambda: 0))
+        self.mc1, self.mc2 = mc1, mc2
         c1 = mc1.chain
         c2 = mc2.chain
 
@@ -63,3 +72,13 @@ class MarkovChainIntersection(MarkovChain):
                     if node in nodes2:
                         count2 = nodes2[node]
                         self.chain[word][node] = min(count1, count2)
+
+    def __repr__(self):
+        """Return the canonical string representation of the intersection."""
+        res = "MarkovChainIntersection(mc1={0!r}, mc2={1!r})"
+        return res.format(self.mc1, self.mc2)
+
+    def __str__(self):
+        """Return a nice string representation of the intersection."""
+        res = "<MarkovChainIntersection of size {0} ({1} ^ {2})>"
+        return res.format(self.size(), self.mc1, self.mc2)
diff --git a/earwigbot/wiki/copyvios/parsers.py b/earwigbot/wiki/copyvios/parsers.py
index 9e97267..0c3c17b 100644
--- a/earwigbot/wiki/copyvios/parsers.py
+++ b/earwigbot/wiki/copyvios/parsers.py
@@ -23,6 +23,15 @@
 __all__ = ["BaseTextParser", "ArticleTextParser", "HTMLTextParser"]
 
 class BaseTextParser(object):
+    def __repr__(self):
+        """Return the canonical string representation of the text parser."""
+        return "{0}(text={1!r})".format(self.__class__.__name__, self.text)
+
+    def __str__(self):
+        """Return a nice string representation of the text parser."""
+        name = self.__class__.__name__
+        return "<{0} of text with size {1}>".format(name, len(text))
+
     def __init__(self, text):
         self.text = text
 
diff --git a/earwigbot/wiki/copyvios/search.py b/earwigbot/wiki/copyvios/search.py
index d8091ee..4345b29 100644
--- a/earwigbot/wiki/copyvios/search.py
+++ b/earwigbot/wiki/copyvios/search.py
@@ -37,6 +37,14 @@ class BaseSearchEngine(object):
         """Store credentials 'cred' for searching later on."""
         self.cred = cred
 
+    def __repr__(self):
+        """Return the canonical string representation of the search engine."""
+        return "{0}()".format(self.__class__.__name__)
+
+    def __str__(self):
+        """Return a nice string representation of the search engine."""
+        return "<{0}>".format(self.__class__.__name__)
+
     def search(self, query):
         """Use this engine to search for 'query'.