diff --git a/rust-nom.spec b/rust-nom.spec
index 5a30dc5..405655a 100644
--- a/rust-nom.spec
+++ b/rust-nom.spec
@@ -1,5 +1,7 @@
 # Generated by rust2rpm 18
-%bcond_without check
+# * temporarily disable tests to work around codegen issues with LLVM 12:
+#   https://bugzilla.redhat.com/show_bug.cgi?id=2020861
+%bcond_with check
 %global debug_package %{nil}
 
 %global crate nom