diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index 4ffa498517..40c8d40e8f 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -68702,7 +68702,9 @@ function family including SHA-224, SHA-256, SHA-384, and SHA-512.")
        (sha256
         (base32 "0s9yddvyg6anaikdl86wmwfim25c0d4m0xq0y2ghs34alxpg8mm2"))))
     (arguments
-     `(#:cargo-inputs
+     `(#:cargo-test-flags
+       '("--release" "--lib" "--bins" "--tests")
+       #:cargo-inputs
        (("rust-block-buffer" ,rust-block-buffer-0.7)
         ("rust-digest" ,rust-digest-0.8)
         ("rust-fake-simd" ,rust-fake-simd-0.1)