diff --git a/dev-libs/mongo-c-driver/mongo-c-driver-1.8.2.ebuild b/dev-libs/mongo-c-driver/mongo-c-driver-1.8.2.ebuild
index 179b8e0a1758a..256c3356f431e 100644
--- a/dev-libs/mongo-c-driver/mongo-c-driver-1.8.2.ebuild
+++ b/dev-libs/mongo-c-driver/mongo-c-driver-1.8.2.ebuild
@@ -23,6 +23,10 @@ RDEPEND="app-arch/snappy:=
 DEPEND="${RDEPEND}
 	test? ( dev-db/mongodb )"
 
+# No tests on x86 because tests require dev-db/mongodb which don't support
+# x86 anymore (bug #645994)
+RESTRICT="x86? ( test )"
+
 src_prepare() {
 	# remove bundled libs
 	rm -rv src/{libbson,zlib*} || die