diff --git a/python-jaraco-classes.spec b/python-jaraco-classes.spec
index de772f6..eecbaa7 100644
--- a/python-jaraco-classes.spec
+++ b/python-jaraco-classes.spec
@@ -25,6 +25,7 @@ Requires:       python3dist(six)
 BuildConflicts: python3dist(pytest) = 3.7.3
 BuildRequires:  python3-devel
 BuildRequires:  python3dist(pytest) >= 3.4
+BuildRequires:  python3dist(more-itertools)
 
 BuildRequires:  python3dist(setuptools)
 BuildRequires:  python3dist(setuptools-scm) >= 1.15