diff --git a/src/main/java/org/jpeek/graph/Disjoint.java b/src/main/java/org/jpeek/graph/Disjoint.java
index a76192fc..b937d0e8 100644
--- a/src/main/java/org/jpeek/graph/Disjoint.java
+++ b/src/main/java/org/jpeek/graph/Disjoint.java
@@ -54,19 +54,19 @@ public List<Set<Node>> value() throws Exception {
         final List<Set<Node>> result = new ArrayList<>(unvisited.size());
         while (!unvisited.isEmpty()) {
             final Node node = unvisited.iterator().next();
-            final Set<Node> adding = new HashSet<>();
-            adding.add(node);
+            final Set<Node> visiting = new HashSet<>();
+            visiting.add(node);
             final Set<Node> current = new HashSet<>();
-            while (!adding.isEmpty()) {
-                final Node visit = adding.iterator().next();
+            while (!visiting.isEmpty()) {
+                final Node visit = visiting.iterator().next();
                 current.add(visit);
                 for (final Node connexion:visit.connections()) {
                     if (!current.contains(connexion)) {
-                        adding.add(connexion);
+                        visiting.add(connexion);
                     }
                 }
                 unvisited.remove(visit);
-                adding.remove(visit);
+                visiting.remove(visit);
             }
             result.add(current);
         }
diff --git a/src/test/java/org/jpeek/graph/DisjointTest.java b/src/test/java/org/jpeek/graph/DisjointTest.java
index f482fcc5..0a00004a 100644
--- a/src/test/java/org/jpeek/graph/DisjointTest.java
+++ b/src/test/java/org/jpeek/graph/DisjointTest.java
@@ -74,4 +74,36 @@ public void calculatesDisjointSets() throws Exception {
         ).affirm();
     }
 
+    @Test
+    @SuppressWarnings("unchecked")
+    public void calculatesDisjointSetsForUnconnected() throws Exception {
+        final Node one = new Node.Simple("1");
+        final Node two = new Node.Simple("2");
+        final Node three = new Node.Simple("3");
+        final Node four = new Node.Simple("4");
+        final Graph graph = new FakeGraph(
+            new ListOf<>(one, two, three, four)
+        );
+        new Assertion<>(
+            "Must build disjoint sets for unconnected graph",
+            new Disjoint(graph).value(),
+            new AllOf<Iterable<Set<Node>>>(
+                new ListOf<>(
+                    new HasValuesMatching<>(
+                        set -> set.contains(one) && set.size() == 1
+                    ),
+                    new HasValuesMatching<>(
+                        set -> set.contains(two) && set.size() == 1
+                    ),
+                    new HasValuesMatching<>(
+                        set -> set.contains(three) && set.size() == 1
+                    ),
+                    new HasValuesMatching<>(
+                        set -> set.contains(four) && set.size() == 1
+                    )
+                )
+            )
+        ).affirm();
+    }
+
 }