diff --git a/kde-apps/kcalc/kcalc-24.08.3.ebuild b/kde-apps/kcalc/kcalc-24.08.3.ebuild
index 0d9a346f235f7..c6145ba227142 100644
--- a/kde-apps/kcalc/kcalc-24.08.3.ebuild
+++ b/kde-apps/kcalc/kcalc-24.08.3.ebuild
@@ -33,3 +33,7 @@ DEPEND="
 "
 RDEPEND="${DEPEND}"
 BDEPEND="sys-devel/gettext"
+
+src_test() {
+	LC_NUMERIC="C" ecm_src_test
+}
diff --git a/kde-apps/kcalc/kcalc-24.12.2.ebuild b/kde-apps/kcalc/kcalc-24.12.2.ebuild
index e823fd023d0fe..5b5203e274a58 100644
--- a/kde-apps/kcalc/kcalc-24.12.2.ebuild
+++ b/kde-apps/kcalc/kcalc-24.12.2.ebuild
@@ -34,3 +34,7 @@ DEPEND="
 "
 RDEPEND="${DEPEND}"
 BDEPEND="sys-devel/gettext"
+
+src_test() {
+	LC_NUMERIC="C" ecm_src_test
+}