diff --git a/Cargo.toml b/Cargo.toml
index 08d647d..12b7829 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ repository = "https://github.com/onecodex/needletail"
 license = "MIT"
 readme = "./README.md"
 edition = "2021"
-include = ["src/**/*", "LICENSE", "README.md", "CHANGELOG.md"]
+include = ["src/**/*", "tests/**/*", "LICENSE", "README.md", "CHANGELOG.md"]
 
 [lib]
 crate-type = ["cdylib", "rlib"]