diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index 9bbc8a93b3..40653af13a 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -12339,7 +12339,8 @@ recovery.")
          "00pr17g6q6i752acrkycg0hkq3lm0p634anm41g3m6lqg8q83s75"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:cargo-test-flags
+     `(#:parallel-tests? #f             ;fails otherwise
+       #:cargo-test-flags
        '("--release" "--"
          "--skip=ci::ci_test::get_bamboo"
          "--skip=ci::ci_test::get_taskcluster_runid"