diff --git a/lib/WebGUI/Macro/PageTitle.pm b/lib/WebGUI/Macro/PageTitle.pm
index 4227df80b..630934cb4 100644
--- a/lib/WebGUI/Macro/PageTitle.pm
+++ b/lib/WebGUI/Macro/PageTitle.pm
@@ -24,7 +24,7 @@ Macro for returning the title of the current Asset.
 
 Returns the title of the current Asset.  If a WebGUI operation or function
 is active, then the title is returned as a link to the Asset.  If there is
-no asset cached in the session variable, nothing is returned.
+no asset cached in the session variable, undef is returned.
 
 =cut
 
diff --git a/lib/WebGUI/Session/Stow.pm b/lib/WebGUI/Session/Stow.pm
index c684f323c..059881576 100644
--- a/lib/WebGUI/Session/Stow.pm
+++ b/lib/WebGUI/Session/Stow.pm
@@ -95,7 +95,9 @@ sub DESTROY {
 
 =head2 get( varName ) 
 
-Retrieves the current value of a stow variable.
+Retrieves the current value of a stow variable.  Note that if you use references, you're
+getting back a reference and modifying the contents of the reference will change the
+contents of the stow variable.
 
 =head3 varName
 
@@ -155,7 +157,7 @@ The name of the stow variable.
 
 =head3 value
 
-The value of the  stow variable.  Any scalar or reference.
+The value of the stow variable.  Any scalar or reference.
 
 =cut
 
diff --git a/t/Macro/CanEditText.t b/t/Macro/CanEditText.t
index 2d50fb893..aa75f6e72 100644
--- a/t/Macro/CanEditText.t
+++ b/t/Macro/CanEditText.t
@@ -21,7 +21,6 @@ my $session = WebGUI::Test->session;
 use Test::More; # increment this value for each test you create
 
 my $homeAsset = WebGUI::Asset->getDefault($session);
-$session->asset($homeAsset);
 my ($versionTag, $asset, $group, @users) = setupTest($session, $homeAsset);
 
 my @testSets = (
@@ -62,7 +61,7 @@ my @testSets = (
 	},
 );
 
-my $numTests = scalar @testSets + 1;
+my $numTests = scalar @testSets + 2;
 
 plan tests => $numTests;
 
@@ -73,6 +72,12 @@ SKIP: {
 
 skip "Unable to load $macro", $numTests-1 unless $loaded;
 
+is(
+	WebGUI::Macro::CanEditText::process($session,''),
+	'',
+	q!Call with no default session asset returns ''!,
+);
+
 foreach my $testSet (@testSets) {
 	$session->user({userId=>$testSet->{userId}});
 	$session->asset($testSet->{asset});
diff --git a/t/Macro/EditableToggle.t b/t/Macro/EditableToggle.t
index 21b09af44..5034d4d54 100644
--- a/t/Macro/EditableToggle.t
+++ b/t/Macro/EditableToggle.t
@@ -22,7 +22,6 @@ use Test::More; # increment this value for each test you create
 my $session = WebGUI::Test->session;
 
 my $homeAsset = WebGUI::Asset->getDefault($session);
-$session->asset($homeAsset);
 my ($versionTag, $asset, @users) = setupTest($session, $homeAsset);
 
 my $i18n = WebGUI::International->new($session,'Macro_EditableToggle');
@@ -185,7 +184,7 @@ foreach my $testSet (@testSets) {
 	$numTests += 1 + (ref $testSet->{output} eq 'CODE');
 }
 
-$numTests += 1;
+$numTests += 1 + 1; ##Empty session Asset plus use_ok
 
 plan tests => $numTests;
 
@@ -196,6 +195,12 @@ SKIP: {
 
 skip "Unable to load $macro", $numTests-1 unless $loaded;
 
+is(
+	WebGUI::Macro::EditableToggle::process($session,'on','off',''),
+	'',
+	q!Call with no default session asset returns ''!,
+);
+
 foreach my $testSet (@testSets) {
 	$session->user({userId=>$testSet->{userId}});
 	$session->asset($testSet->{asset});
diff --git a/t/Macro/H_homeLink.t b/t/Macro/H_homeLink.t
index d497330f9..da86158d9 100644
--- a/t/Macro/H_homeLink.t
+++ b/t/Macro/H_homeLink.t
@@ -35,7 +35,7 @@ my @testSets = (
 		comment => 'linkonly argument',
 	},
 	{
-		label => $i18n->get(47),
+		label => q!!,
 		template => q!!,
 		url => $homeAsset->getUrl(),
 		output => \&simpleHTMLParser,
@@ -75,6 +75,7 @@ skip "Unable to load $macro", $numTests-1 unless $loaded;
 
 foreach my $testSet (@testSets) {
 	my $output = WebGUI::Macro::H_homeLink::process($session, $testSet->{label}, $testSet->{template});
+	$testSet->{label} ||= $i18n->get(47);
 	if (ref $testSet->{output} eq 'CODE') {
 		my ($url, $label) = $testSet->{output}->($output);
 		is($label, $testSet->{label}, $testSet->{comment}.", label");
diff --git a/t/Macro/Page.t b/t/Macro/Page.t
index cddb7ab01..5f21e8cfb 100644
--- a/t/Macro/Page.t
+++ b/t/Macro/Page.t
@@ -47,6 +47,7 @@ foreach my $testSet (@testSets) {
 }
 
 $numTests += 1; #For the use_ok
+$numTests += 1; #For macro call with undefined session asset
 
 plan tests => $numTests;
 
@@ -62,6 +63,12 @@ SKIP: {
 
 skip "Unable to load $macro", $numTests-1 unless $loaded;
 
+is(
+	WebGUI::Macro::Page::process($session,'url'),
+	'',
+	q!Call with no default session asset returns ''!,
+);
+
 foreach my $testSet (@testSets) {
 	$session->asset($testSet->{asset});
 	my $class = $testSet->{className};
diff --git a/t/Macro/PageTitle.t b/t/Macro/PageTitle.t
index 589ce2ac8..55cdcc48b 100644
--- a/t/Macro/PageTitle.t
+++ b/t/Macro/PageTitle.t
@@ -20,7 +20,7 @@ use Test::More; # increment this value for each test you create
 
 my $session = WebGUI::Test->session;
 
-my $numTests = 2;
+my $numTests = 3;
 $numTests += 1; #For the use_ok
 
 plan tests => $numTests;
@@ -49,6 +49,12 @@ SKIP: {
 
 skip "Unable to load $macro", $numTests-1 unless $loaded;
 
+is(
+	WebGUI::Macro::PageTitle::process($session),
+	undef,
+	q!Call with no default session asset returns undef!,
+);
+
 ##Make the homeAsset the default asset in the session.
 $session->asset($homeAsset);
 
@@ -61,6 +67,23 @@ is($macroOutput, $snippet->get('title'), "testing title returned from localy cre
 
 }
 
+my $origSessionRequest = $session->{_request};
+
+my ($operation, $function) = (0,0);
+
+my $request = Test::MockObject->new;
+$request->mock('body',
+	sub {
+		my ($self, $value) = @_;
+		return 1 if $operation;
+		return 1 if $function;
+		return 0;
+	}
+);
+
+$output = WebGUI::Macro::PageTitle::process($session);
+is($output, $homeAsset->get('title'), 'fetching title for site default asset');
+
 END {
 	$versionTag->rollback;
 }
diff --git a/t/Macro/Spacer.t b/t/Macro/Spacer.t
index a95c20fb9..dd1f5de66 100644
--- a/t/Macro/Spacer.t
+++ b/t/Macro/Spacer.t
@@ -43,12 +43,24 @@ my @testSets = (
 		width => '',
 		height => 7,
 	},
+	{
+		comment => 'width only, undef',
+		width => 9,
+		height => undef,
+	},
+	{
+		comment => 'height only, undef',
+		width => undef,
+		height => 17,
+	},
 );
 
 plan tests => 5 + 2 * scalar @testSets;
 
 foreach my $testSet (@testSets) {
 	my $output = WebGUI::Macro::Spacer::process($session, $testSet->{width}, $testSet->{height});
+	$testSet->{width} = '' unless defined $testSet->{width};
+	$testSet->{height} = '' unless defined $testSet->{height};
 	my ($width, $height) = simpleHTMLParser($output);
 	is($width,  $testSet->{width},  $testSet->{comment}.", width");
 	is($height, $testSet->{height}, $testSet->{comment}.", height");
diff --git a/t/Macro/Thumbnail.t b/t/Macro/Thumbnail.t
index e79e26c07..6ecf0ce3b 100644
--- a/t/Macro/Thumbnail.t
+++ b/t/Macro/Thumbnail.t
@@ -22,10 +22,16 @@ use Image::Magick;
 
 use Test::More; # increment this value for each test you create
 use Test::Deep;
-plan tests => 7;
+plan tests => 8;
 
 my $session = WebGUI::Test->session;
 
+is(
+	WebGUI::Macro::Thumbnail::process($session, '/url-that-does-not-resolve'),
+	undef,
+	'non-existant URL returns undef'
+);
+
 my $square = WebGUI::Image->new($session, 100, 100);
 $square->setBackgroundColor('#0000FF');
 
diff --git a/t/Session/Stow.t b/t/Session/Stow.t
index 4383bea03..101bff02a 100644
--- a/t/Session/Stow.t
+++ b/t/Session/Stow.t
@@ -15,7 +15,7 @@ use lib "$FindBin::Bin/../lib";
 use WebGUI::Test;
 use WebGUI::Session;
 
-use Test::More tests => 26; # increment this value for each test you create
+use Test::More tests => 29; # increment this value for each test you create
  
 my $session = WebGUI::Test->session;
  
@@ -59,3 +59,9 @@ my $milList = $stow->get("military");
 push @{ $milList }, qw/foxtrot echo/;
 
 is_deeply($stow->get("military"), [ @orig_list, qw/foxtrot echo/ ], "modifying fetched list changes stow'ed list because it is a reference");
+
+is($stow->delete(), undef, 'deleting with no key returns undef');
+is($stow->delete('noSuchKey'), undef, 'deleting non-existant variable returns undef');
+
+$stow->set('countedKey', 5);
+is($stow->delete('countedKey'), 5, 'delete method returns what was deleted');