diff --git a/aoc2020/src/day01.rs b/aoc2020/src/day01.rs
index cd5220f..a9556df 100644
--- a/aoc2020/src/day01.rs
+++ b/aoc2020/src/day01.rs
@@ -77,7 +77,7 @@ fn find_2020_3_sum(entries: &[i64]) -> Result<(i64, i64, i64)> {
 mod tests {
     use super::*;
 
-    static PROVIDED: &[i64] = &[1721, 979, 366, 299, 675, 1456];
+    const PROVIDED: &[i64] = &[1721, 979, 366, 299, 675, 1456];
 
     #[test]
     fn part1_provided() {
diff --git a/aoc2020/src/day02.rs b/aoc2020/src/day02.rs
index 66696f5..2491d75 100644
--- a/aoc2020/src/day02.rs
+++ b/aoc2020/src/day02.rs
@@ -117,9 +117,9 @@ fn part2(input: &str) -> Result<usize> {
 mod tests {
     use super::*;
 
-    static PROVIDED1: &'static str = "1-3 a: abcde";
-    static PROVIDED2: &'static str = "1-3 b: cdefg";
-    static PROVIDED3: &'static str = "2-9 c: ccccccccc";
+    const PROVIDED1: &str = "1-3 a: abcde";
+    const PROVIDED2: &str = "1-3 b: cdefg";
+    const PROVIDED3: &str = "2-9 c: ccccccccc";
 
     #[test]
     fn part1_provided() {
diff --git a/aoc2020/src/day03.rs b/aoc2020/src/day03.rs
index 326a62f..1b42bba 100644
--- a/aoc2020/src/day03.rs
+++ b/aoc2020/src/day03.rs
@@ -107,7 +107,7 @@ impl FromStr for Forest {
 mod tests {
     use super::*;
 
-    static PROVIDED: &'static str = include_str!("../input/day03_provided.txt");
+    const PROVIDED: &str = include_str!("../input/day03_provided.txt");
 
     #[test]
     fn part1_provided() {
diff --git a/aoc2020/src/day04.rs b/aoc2020/src/day04.rs
index 3cc5cc5..6c44372 100644
--- a/aoc2020/src/day04.rs
+++ b/aoc2020/src/day04.rs
@@ -196,9 +196,9 @@ fn is_number_in_range(s: &str, range: RangeInclusive<i64>) -> bool {
 mod tests {
     use super::*;
 
-    static PROVIDED1: &'static str = include_str!("../input/day04_provided1.txt");
-    static PROVIDED2: &'static str = include_str!("../input/day04_provided2.txt");
-    static PROVIDED3: &'static str = include_str!("../input/day04_provided3.txt");
+    const PROVIDED1: &str = include_str!("../input/day04_provided1.txt");
+    const PROVIDED2: &str = include_str!("../input/day04_provided2.txt");
+    const PROVIDED3: &str = include_str!("../input/day04_provided3.txt");
 
     #[test]
     fn part1_provided() {
diff --git a/aoc2020/src/day06.rs b/aoc2020/src/day06.rs
index 810f75b..61c7e62 100644
--- a/aoc2020/src/day06.rs
+++ b/aoc2020/src/day06.rs
@@ -81,7 +81,7 @@ impl Group {
 mod tests {
     use super::*;
 
-    static PROVIDED: &'static str = include_str!("../input/day06_provided.txt");
+    const PROVIDED: &str = include_str!("../input/day06_provided.txt");
 
     #[test]
     fn part1_provided() {
diff --git a/aoc2020/src/day07.rs b/aoc2020/src/day07.rs
index bc13f81..f925192 100644
--- a/aoc2020/src/day07.rs
+++ b/aoc2020/src/day07.rs
@@ -161,8 +161,8 @@ impl FromStr for BagRule {
 mod tests {
     use super::*;
 
-    static PROVIDED1: &'static str = include_str!("../input/day07_provided1.txt");
-    static PROVIDED2: &'static str = include_str!("../input/day07_provided2.txt");
+    const PROVIDED1: &str = include_str!("../input/day07_provided1.txt");
+    const PROVIDED2: &str = include_str!("../input/day07_provided2.txt");
 
     #[test]
     fn part1_provided_parse() {