diff --git a/pyproject.toml b/pyproject.toml
index e162d16..0190e44 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,6 +5,9 @@ build-backend = "hatchling.build"
 [tool.hatch.version]
 source = "vcs"
 
+[tool.hatch.build.targets.wheel]
+exclude = ["referencing/tests/**"]
+
 [project]
 name = "referencing"
 description = "JSON Referencing + Python"