diff --git a/libssh.spec b/libssh.spec
index 23ecbf0..1573a23 100644
--- a/libssh.spec
+++ b/libssh.spec
@@ -108,6 +108,8 @@ popd
 %ldconfig_scriptlets
 
 %check
+# Tests are randomly failing when run in parallel
+%global _smp_build_ncpus 1
 %ctest
 
 %files