diff --git a/gnu/packages/smalltalk.scm b/gnu/packages/smalltalk.scm
index 988410d93d..88a1bbc2c2 100644
--- a/gnu/packages/smalltalk.scm
+++ b/gnu/packages/smalltalk.scm
@@ -25,6 +25,7 @@
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
   #:use-module (guix download)
+  #:use-module (guix utils)
   #:use-module (guix build-system cmake)
   #:use-module (guix build-system gnu)
   #:use-module (gnu packages)
@@ -82,7 +83,10 @@
     (inputs
      (list gmp libffi libltdl libsigsegv lightning))
     (arguments
-     `(#:phases
+     `(;; FIXME: Tests fail on x86-64 in the build container, but they pass
+       ;; in a regular shell.
+       #:tests? ,(not (target-x86-64?))
+       #:phases
        (modify-phases %standard-phases
          ;; XXX: To be removed with the next release of Smalltalk.
          ;; The overflow patch modifies configure.ac, therefore remove