diff --git a/scripts/test.sh b/scripts/test.sh
index a8880cf8..05bd470a 100755
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -62,10 +62,14 @@ check_versions_match "${LIB_DIR}" "${CODEGEN_DIR}" "${CONTRIB_DIR}"
 echo ":: Checking for tabs..."
 ensure_tab_free
 
-# Update dependencies before running tests.
 echo ":: Updating dependencies..."
 cargo update
 
+echo ":: Cleaning cached crates..."
+cargo clean -p rocket
+cargo clean -p rocket_codegen
+cargo clean -p rocket_contrib
+
 echo ":: Building and testing libraries..."
 build_and_test "${LIB_DIR}"
 build_and_test "${CODEGEN_DIR}"