diff --git a/2018/src/day03.rs b/2018/src/day03.rs
index eb469cb..b86b800 100644
--- a/2018/src/day03.rs
+++ b/2018/src/day03.rs
@@ -103,9 +103,7 @@ mod tests {
 
     use super::*;
 
-    const SAMPLE_INPUT: &[u8] = b"#1 @ 1,3: 4x4
-#2 @ 3,1: 4x4
-#3 @ 5,5: 2x2";
+    const SAMPLE_INPUT: &[u8] = include_bytes!("samples/03");
 
     #[test]
     fn sample_part1() {
diff --git a/2018/src/day04.rs b/2018/src/day04.rs
index e05c509..95877bc 100644
--- a/2018/src/day04.rs
+++ b/2018/src/day04.rs
@@ -119,23 +119,7 @@ mod tests {
     use common::Solution;
     use day04::Day04;
 
-    const SAMPLE_INPUT: &[u8] = b"[1518-11-01 00:00] Guard #10 begins shift
-[1518-11-01 00:05] falls asleep
-[1518-11-01 00:25] wakes up
-[1518-11-01 00:30] falls asleep
-[1518-11-01 00:55] wakes up
-[1518-11-01 23:58] Guard #99 begins shift
-[1518-11-02 00:40] falls asleep
-[1518-11-02 00:50] wakes up
-[1518-11-03 00:05] Guard #10 begins shift
-[1518-11-03 00:24] falls asleep
-[1518-11-03 00:29] wakes up
-[1518-11-04 00:02] Guard #99 begins shift
-[1518-11-04 00:36] falls asleep
-[1518-11-04 00:46] wakes up
-[1518-11-05 00:03] Guard #99 begins shift
-[1518-11-05 00:45] falls asleep
-[1518-11-05 00:55] wakes up";
+    const SAMPLE_INPUT: &[u8] = include_bytes!("samples/04");
 
     #[test]
     fn sample_part1() {
diff --git a/2018/src/day05.rs b/2018/src/day05.rs
index c0a8e9a..a573ee1 100644
--- a/2018/src/day05.rs
+++ b/2018/src/day05.rs
@@ -52,7 +52,7 @@ mod tests {
     use common::Solution;
     use day05::Day05;
 
-    const SAMPLE_INPUT: &[u8] = b"dabAcCaCBAcCcaDA\n";
+    const SAMPLE_INPUT: &[u8] = include_bytes!("samples/05");
 
     #[test]
     fn sample_part1() {
diff --git a/2018/src/samples/03 b/2018/src/samples/03
new file mode 100644
index 0000000..3755d52
--- /dev/null
+++ b/2018/src/samples/03
@@ -0,0 +1,3 @@
+#1 @ 1,3: 4x4
+#2 @ 3,1: 4x4
+#3 @ 5,5: 2x2
diff --git a/2018/src/samples/04 b/2018/src/samples/04
new file mode 100644
index 0000000..496d314
--- /dev/null
+++ b/2018/src/samples/04
@@ -0,0 +1,17 @@
+[1518-11-01 00:00] Guard #10 begins shift
+[1518-11-01 00:05] falls asleep
+[1518-11-01 00:25] wakes up
+[1518-11-01 00:30] falls asleep
+[1518-11-01 00:55] wakes up
+[1518-11-01 23:58] Guard #99 begins shift
+[1518-11-02 00:40] falls asleep
+[1518-11-02 00:50] wakes up
+[1518-11-03 00:05] Guard #10 begins shift
+[1518-11-03 00:24] falls asleep
+[1518-11-03 00:29] wakes up
+[1518-11-04 00:02] Guard #99 begins shift
+[1518-11-04 00:36] falls asleep
+[1518-11-04 00:46] wakes up
+[1518-11-05 00:03] Guard #99 begins shift
+[1518-11-05 00:45] falls asleep
+[1518-11-05 00:55] wakes up
diff --git a/2018/src/samples/05 b/2018/src/samples/05
new file mode 100644
index 0000000..8637b35
--- /dev/null
+++ b/2018/src/samples/05
@@ -0,0 +1 @@
+dabAcCaCBAcCcaDA