diff --git a/unit-tests/btree_counter_t.cc b/unit-tests/btree_counter_t.cc
index dbc36f6..0b64585 100644
--- a/unit-tests/btree_counter_t.cc
+++ b/unit-tests/btree_counter_t.cc
@@ -54,12 +54,6 @@ namespace {
 			block_manager<>::write_ref superblock(bm_->superblock(SUPERBLOCK));
 		}
 	};
-
-	void dump_counts(block_counter const &bc) {
-		block_counter::count_map::const_iterator it, end = bc.get_counts().end();
-		for (it = bc.get_counts().begin(); it != end; ++it)
-			cout << it->first << " -> " << it->second << endl;
-	}
 }
 
 //----------------------------------------------------------------
diff --git a/unit-tests/btree_damage_visitor_t.cc b/unit-tests/btree_damage_visitor_t.cc
index f88ee18..71f6006 100644
--- a/unit-tests/btree_damage_visitor_t.cc
+++ b/unit-tests/btree_damage_visitor_t.cc
@@ -76,29 +76,6 @@ namespace {
 		run<uint64_t> keys;
 	};
 
-	ostream &operator <<(ostream &out, node_info const &ni) {
-		out << "node_info [leaf = " << ni.leaf
-		    << ", depth " << ni.depth
-		    << ", path [";
-
-		bool first = true;
-		btree_detail::btree_path::const_iterator it;
-		for (it = ni.path.begin(); it != ni.path.end(); ++it) {
-			if (first)
-				first = false;
-			else
-				out << ", ";
-
-			out << *it;
-		}
-
-		out << "], b " << ni.b
-		    << ", keys " << ni.keys
-		    << "]";
-
-		return out;
-	}
-
 	bool is_leaf(node_info const &n) {
 		return n.leaf;
 	}
diff --git a/unit-tests/cache_superblock_t.cc b/unit-tests/cache_superblock_t.cc
index 03f1a8c..f80b8dd 100644
--- a/unit-tests/cache_superblock_t.cc
+++ b/unit-tests/cache_superblock_t.cc
@@ -38,19 +38,6 @@ namespace {
 		superblock sb_;
 	};
 
-	bool operator ==(superblock_corrupt const &lhs, superblock_corrupt const &rhs) {
-		return lhs.get_desc() == rhs.get_desc();
-	}
-
-	bool operator ==(superblock_invalid const &lhs, superblock_invalid const &rhs) {
-		return lhs.get_desc() == rhs.get_desc();
-	}
-
-	ostream &operator <<(ostream &out, damage const &d) {
-		out << d.get_desc();
-		return out;
-	}
-
 	ostream &operator <<(ostream &out, superblock_invalid const &d) {
 		out << "superblock_invalid: " << d.get_desc();
 		return out;
diff --git a/unit-tests/copier_t.cc b/unit-tests/copier_t.cc
index 1621c4c..d1a6687 100644
--- a/unit-tests/copier_t.cc
+++ b/unit-tests/copier_t.cc
@@ -33,11 +33,6 @@ namespace {
 	unsigned const BLOCK_SIZE = 64u;
 	using wait_result = io_engine::wait_result;
 
-	ostream &operator <<(ostream &out, wait_result const &wr) {
-		out << "wait_result[" << wr.first << ", " << wr.second << "]";
-		return out;
-	}
-
 	ostream &operator <<(ostream &out, optional<wait_result> const &mwr) {
 		if (mwr) {
 			out << "Just[wait_result[" << mwr->first << ", " << mwr->second << "]]";