diff --git a/networks.rkt b/networks.rkt
index 9d8e78f..93fa991 100644
--- a/networks.rkt
+++ b/networks.rkt
@@ -469,11 +469,10 @@
 
 (module+ test
   (test-case "interaction?"
-    (define n-bool (hash 'x '(not y)
-                         'y 'x
-                         'z '(and y z)))
-    (define bool-doms (make-boolean-domains '(x y z)))
-    (define n1 (network-form->network (network-form n-bool bool-doms)))
+    (define n1 (forms->boolean-network
+                (hash 'x '(not y)
+                      'y 'x
+                      'z '(and y z))))
     (check-true (interaction? n1 'x 'y))
     (check-true (interaction? n1 'y 'x))
     (check-false (interaction? n1 'x 'z))
@@ -529,13 +528,12 @@
 
 (module+ test
   (test-case "get-interaction-sign"
-    (define n-bool (hash 'x '(not y)
-                         'y 'x
-                         'z '(and y z)
-                         't '(or (and (not x) y)
-                                 (and x (not y)))))
-    (define bool-doms (make-boolean-domains '(x y z t)))
-    (define n1 (network-form->network (network-form n-bool bool-doms)))
+    (define n1 (forms->boolean-network
+                (hash 'x '(not y)
+                      'y 'x
+                      'z '(and y z)
+                      't '(or (and (not x) y)
+                              (and x (not y))))))
     (check-equal? (get-interaction-sign n1 'x 'y) 1)
     (check-equal? (get-interaction-sign n1 'y 'x) -1)
     (check-false (get-interaction-sign n1 'x 'z))
@@ -575,13 +573,12 @@
       [skip-expensive-tests?
        (displayln "Skipping test case build-interaction-graph.")]
       [else
-       (define n-bool (hash 'x '(not y)
-                            'y 'x
-                            'z '(and y z)
-                            't '(or (and (not x) y)
-                                    (and x (not y)))))
-       (define bool-doms (make-boolean-domains '(x y z t)))
-       (define n1 (network-form->network (network-form n-bool bool-doms)))
+       (define n1 (forms->boolean-network
+                   (hash 'x '(not y)
+                         'y 'x
+                         'z '(and y z)
+                         't '(or (and (not x) y)
+                                 (and x (not y))))))
        (check-equal? (graphviz (build-interaction-graph/form n1))
                      "digraph G {\n\tnode0 [label=\"y\"];\n\tnode1 [label=\"z\"];\n\tnode2 [label=\"x\"];\n\tnode3 [label=\"t\"];\n\tsubgraph U {\n\t\tedge [dir=none];\n\t\tnode0 -> node2;\n\t\tnode1 -> node1;\n\t}\n\tsubgraph D {\n\t\tnode0 -> node3;\n\t\tnode0 -> node1;\n\t\tnode2 -> node3;\n\t}\n}\n")
        (define n-multi (hash 'x '(min (+ y 1) 2)
@@ -617,13 +614,12 @@
       [skip-expensive-tests?
        (displayln "Skipping test case build-signed-interaction-graph.")]
       [else
-       (define n-bool (hash 'x '(not y)
-                            'y 'x
-                            'z '(and y z)
-                            't '(or (and (not x) y)
-                                    (and x (not y)))))
-       (define bool-doms (make-boolean-domains '(x y z t)))
-       (define n1 (network-form->network (network-form n-bool bool-doms)))
+       (define n1 (forms->boolean-network
+                   (hash 'x '(not y)
+                         'y 'x
+                         'z '(and y z)
+                         't '(or (and (not x) y)
+                                 (and x (not y))))))
        (check-equal? (graphviz (build-signed-interaction-graph/form n1))
                      "digraph G {\n\tnode0 [label=\"y\"];\n\tnode1 [label=\"z\"];\n\tnode2 [label=\"x\"];\n\tnode3 [label=\"t\"];\n\tsubgraph U {\n\t\tedge [dir=none];\n\t\tnode1 -> node1 [label=\"1\"];\n\t}\n\tsubgraph D {\n\t\tnode0 -> node2 [label=\"-1\"];\n\t\tnode0 -> node3 [label=\"0\"];\n\t\tnode0 -> node1 [label=\"1\"];\n\t\tnode2 -> node3 [label=\"0\"];\n\t\tnode2 -> node0 [label=\"1\"];\n\t}\n}\n")
        (define n-multi (hash 'x '(min (+ y 1) 2)