diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index f3bd938664..a9a5f8afe6 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -1380,11 +1380,7 @@ (define-public ghc-c2hs
        ("ghc-hunit" ,ghc-hunit)
        ("ghc-shelly" ,ghc-shelly)))
     (arguments
-     `(;; XXX: Test failures are induced by a parse error in <bits/floatn.h>
-       ;; of glibc 2.28.
-       #:tests? #f
-
-       #:phases
+     `(#:phases
        (modify-phases %standard-phases
          (add-before 'check 'set-cc
            ;; add a cc executable in the path, needed for some tests to pass