diff --git a/test/basic.js b/test/basic.js
index 6b9fa33..fff4244 100644
--- a/test/basic.js
+++ b/test/basic.js
@@ -14,6 +14,8 @@ function verifyBasic(rendered, sourceFile, mapIncluded) {
   expect(rendered.vars.global).to.have.property('$color');
   expect(rendered.vars.global).to.have.property('$list');
   expect(rendered.vars.global).to.have.property('$string');
+  expect(rendered.vars.global).to.have.property('$boolean');
+  expect(rendered.vars.global).to.have.property('$null');
 
   expect(rendered.vars.global.$number1.value).to.equal(100);
   expect(rendered.vars.global.$number1.unit).to.equal('px');
@@ -67,6 +69,20 @@ function verifyBasic(rendered, sourceFile, mapIncluded) {
   expect(rendered.vars.global.$string.expressions).to.have.length(1);
   expect(rendered.vars.global.$string.expressions[0]).to.equal('\'string\'');
 
+  expect(rendered.vars.global.$boolean.value).to.equal(true);
+  expect(rendered.vars.global.$boolean.type).to.equal('SassBoolean');
+  expect(rendered.vars.global.$boolean.sources).to.have.length(1);
+  expect(rendered.vars.global.$boolean.sources[0]).to.equal(sourceFile);
+  expect(rendered.vars.global.$boolean.expressions).to.have.length(1);
+  expect(rendered.vars.global.$boolean.expressions[0]).to.equal('true');
+
+  expect(rendered.vars.global.$null.value).to.equal(null);
+  expect(rendered.vars.global.$null.type).to.equal('SassNull');
+  expect(rendered.vars.global.$null.sources).to.have.length(1);
+  expect(rendered.vars.global.$null.sources[0]).to.equal(sourceFile);
+  expect(rendered.vars.global.$null.expressions).to.have.length(1);
+  expect(rendered.vars.global.$null.expressions[0]).to.equal('null');
+
   if(mapIncluded) {
     expect(rendered.vars.global.$map.type).to.equal('SassMap');
     expect(rendered.vars.global.$map.value.number.value).to.equal(2);
diff --git a/test/sass/basic-explicit.scss b/test/sass/basic-explicit.scss
index fc2e3eb..01f6d07 100644
--- a/test/sass/basic-explicit.scss
+++ b/test/sass/basic-explicit.scss
@@ -4,4 +4,6 @@ div {
   $color: red !global;
   $list: 1px solid black !global;
   $string: 'string' !global;
+  $boolean: true !global;
+  $null: null !global;
 }
\ No newline at end of file
diff --git a/test/sass/basic-implicit.scss b/test/sass/basic-implicit.scss
index 7eecad4..0737046 100644
--- a/test/sass/basic-implicit.scss
+++ b/test/sass/basic-implicit.scss
@@ -3,6 +3,8 @@ $number2: $number1 * 2;
 $color: red;
 $list: 1px solid black;
 $string: 'string';
+$boolean: true;
+$null: null;
 $map: (
   number: 2em,
   string: 'mapstring'
diff --git a/test/sass/basic-mixed.scss b/test/sass/basic-mixed.scss
index 4b852cc..2d94c28 100644
--- a/test/sass/basic-mixed.scss
+++ b/test/sass/basic-mixed.scss
@@ -9,4 +9,7 @@ div {
   $number1: 100px !global;
   $number2: $number1 * 2 !global;
   $color: red !global;
-}
\ No newline at end of file
+}
+
+$boolean: true;
+$null: null;
\ No newline at end of file