diff --git a/python-numpoly.spec b/python-numpoly.spec
index c31d5c8..d35213c 100644
--- a/python-numpoly.spec
+++ b/python-numpoly.spec
@@ -13,6 +13,10 @@ URL:        https://github.com/jonathf/numpoly
 # Use the github source to build this package.
 Source0:    %{url}/archive/v%{version}/numpoly-%{version}.tar.gz
 BuildArch:  noarch
+# Tests fail on 32 bit arches.
+# Only chaospy depends on it, and chaospy does not support 32 bit arches.
+# So also dropping them here.
+ExcludeArch:    %{ix86} %{arm32}
 
 BuildRequires:  python3-devel
 BuildRequires:  python3dist(setuptools)