diff --git a/tests/imports.rs b/tests/imports.rs
index 9294019..f2b1d53 100644
--- a/tests/imports.rs
+++ b/tests/imports.rs
@@ -12,10 +12,8 @@ macro_rules! test_import {
                 write!(f, $content).unwrap();
             )*
             let mut buf = Vec::new();
-            StyleSheet::new($input.to_string())
-            .expect(concat!("failed to parse in "))
-            .print_as_css(&mut buf)
-            .expect(concat!("failed to pretty print on ", $input));
+            StyleSheet::new($input.to_string(), &mut buf)
+            .expect(concat!("failed to parse on ", $input));
             assert_eq!(
                 String::from($output),
                 String::from_utf8(buf).expect("produced invalid utf8")
diff --git a/tests/macros.rs b/tests/macros.rs
index a9b3269..25b6d04 100644
--- a/tests/macros.rs
+++ b/tests/macros.rs
@@ -8,10 +8,10 @@ macro_rules! test {
         #[allow(non_snake_case)]
         fn $func() {
             let mut buf = Vec::new();
-            grass::StyleSheet::new($input.to_string())
-                .expect(concat!("failed to parse on ", $input))
-                .print_as_css(&mut buf)
-                .expect(concat!("failed to pretty print on ", $input));
+            grass::StyleSheet::new($input.to_string(), &mut buf)
+                .expect(concat!("failed to parse on ", $input));
+                // .print_as_css()
+                // .expect(concat!("failed to pretty print on ", $input));
             assert_eq!(
                 String::from($input),
                 String::from_utf8(buf).expect("produced invalid utf8")
@@ -24,10 +24,8 @@ macro_rules! test {
         #[allow(non_snake_case)]
         fn $func() {
             let mut buf = Vec::new();
-            grass::StyleSheet::new($input.to_string())
-                .expect(concat!("failed to parse on ", $input))
-                .print_as_css(&mut buf)
-                .expect(concat!("failed to pretty print on ", $input));
+            grass::StyleSheet::new($input.to_string(), &mut buf)
+                .expect(concat!("failed to parse on ", $input));
             assert_eq!(
                 String::from($output),
                 String::from_utf8(buf).expect("produced invalid utf8")
@@ -45,7 +43,8 @@ macro_rules! error {
         #[test]
         #[allow(non_snake_case)]
         fn $func() {
-            match grass::StyleSheet::new($input.to_string()) {
+            let mut buf = Vec::new();
+            match grass::StyleSheet::new($input.to_string(), &mut buf) {
                 Ok(..) => panic!("did not fail"),
                 Err(e) => assert_eq!($err, e.to_string()
                                                 .chars()