diff --git a/redo/test/main.c b/redo/test/main.c
index 0cccaa7b..4ebae7ce 100644
--- a/redo/test/main.c
+++ b/redo/test/main.c
@@ -33,6 +33,9 @@ int onShouldQuit(void *data)
 uiBox *mainBox;
 uiTab *mainTab;
 
+uiBox *(*newhbox)(void);
+uiBox *(*newvbox)(void);
+
 int main(int argc, char *argv[])
 {
 	uiInitOptions o;
@@ -42,11 +45,17 @@ int main(int argc, char *argv[])
 	uiBox *page2, *page3, *page4, *page5;
 	int nomenus = 0;
 
+	newhbox = uiNewHorizontalBox;
+	newvbox = uiNewVerticalBox;
+
 	memset(&o, 0, sizeof (uiInitOptions));
 	for (i = 1; i < argc; i++)
 		if (strcmp(argv[i], "nomenus") == 0)
 			nomenus = 1;
-		else {
+		else if (strcmp(argv[i], "swaphv") == 0) {
+			newhbox = uiNewVerticalBox;
+			newvbox = uiNewHorizontalBox;
+		} else {
 			fprintf(stderr, "%s: unrecognized option %s\n", argv[0], argv[i]);
 			return 1;
 		}
diff --git a/redo/test/page3.c b/redo/test/page3.c
index b9b20605..1f229e93 100644
--- a/redo/test/page3.c
+++ b/redo/test/page3.c
@@ -8,7 +8,7 @@ static uiBox *makeSet(int omit, int hidden, int stretch)
 
 	// don't use newHorizontalBox()
 	// the point of this test is to test hidden controls and padded
-	hbox = uiNewHorizontalBox();
+	hbox = (*newhbox)();
 	uiBoxSetPadded(hbox, 1);
 	if (omit != 0) {
 		buttons[0] = uiNewButton("First");
@@ -44,8 +44,8 @@ uiBox *makePage3(void)
 	// first the non-stretchy type
 	for (hidden = 0; hidden < 4; hidden++) {
 		// these two must stay unpadded as well, otherwise the test isn't meaningful
-		hbox2 = uiNewHorizontalBox();
-		vbox = uiNewVerticalBox();
+		hbox2 = (*newhbox)();
+		vbox = (*newvbox)();
 		// reference set
 		hbox = makeSet(hidden, -1, 0);
 		uiBoxAppend(vbox, uiControl(hbox), 0);
diff --git a/redo/test/spaced.c b/redo/test/spaced.c
index 24a11d17..193c2764 100644
--- a/redo/test/spaced.c
+++ b/redo/test/spaced.c
@@ -108,7 +108,7 @@ uiBox *newHorizontalBox(void)
 {
 	uiBox *b;
 
-	b = uiNewHorizontalBox();
+	b = (*newhbox)();
 	append(b, box);
 	return b;
 }
@@ -117,7 +117,7 @@ uiBox *newVerticalBox(void)
 {
 	uiBox *b;
 
-	b = uiNewVerticalBox();
+	b = (*newvbox)();
 	append(b, box);
 	return b;
 }
diff --git a/redo/test/test.h b/redo/test/test.h
index 70164105..2368d30c 100644
--- a/redo/test/test.h
+++ b/redo/test/test.h
@@ -10,6 +10,8 @@
 extern void die(const char *, ...);
 extern uiBox *mainBox;
 extern uiTab *mainTab;
+extern uiBox *(*newhbox)(void);
+extern uiBox *(*newvbox)(void);
 
 // spaced.c
 extern void setSpaced(int);