diff --git a/Cargo.toml b/Cargo.toml
index bae0d95..05b8512 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,7 @@ description = "Read bio image formats using the bio-formats java package."
 homepage = "https://github.com/wimpomp/ndbioimage/tree/rs"
 repository = "https://github.com/wimpomp/ndbioimage/tree/rs"
 readme = "README.md"
+exclude = ["tests/.*"]
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [lib]