diff --git a/dev-libs/c-blosc2/c-blosc2-2.19.0.ebuild b/dev-libs/c-blosc2/c-blosc2-2.19.0.ebuild
index 29b8919c51132..4a31fe106aee0 100644
--- a/dev-libs/c-blosc2/c-blosc2-2.19.0.ebuild
+++ b/dev-libs/c-blosc2/c-blosc2-2.19.0.ebuild
@@ -59,5 +59,5 @@ src_configure() {
 
 src_test() {
 	# Tests fail in parallel, https://github.com/Blosc/c-blosc2/issues/432
-	MAKEOPTS=-j1 cmake_src_test
+	cmake_src_test -j1
 }
diff --git a/dev-libs/c-blosc2/c-blosc2-2.19.1.ebuild b/dev-libs/c-blosc2/c-blosc2-2.19.1.ebuild
index 00ff5d98f4f1f..2f8051c6386ba 100644
--- a/dev-libs/c-blosc2/c-blosc2-2.19.1.ebuild
+++ b/dev-libs/c-blosc2/c-blosc2-2.19.1.ebuild
@@ -59,5 +59,5 @@ src_configure() {
 
 src_test() {
 	# Tests fail in parallel, https://github.com/Blosc/c-blosc2/issues/432
-	MAKEOPTS=-j1 cmake_src_test
+	cmake_src_test -j1
 }