diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index 5ce03546dc..5b4db1a9c2 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -7931,7 +7931,9 @@ bindings to C and C++ libraries.")
          (base32
           "1jpk0p4l4dg1lpvciq9q8wm94sjsflb1vb5x2gk9dlizv4gl2gcx"))))
     (arguments
-     `(#:cargo-inputs
+     `(#:cargo-test-flags
+       '("--release" "--lib" "--bins" "--tests")
+       #:cargo-inputs
        (("rust-bitflags" ,rust-bitflags-1)
         ("rust-cexpr" ,rust-cexpr-0.3)
         ("rust-cfg-if" ,rust-cfg-if-0.1)