diff --git a/e2e/framework/server_utils_test.go b/e2e/framework/server_utils_test.go
new file mode 100644
index 0000000000..ec435ea389
--- /dev/null
+++ b/e2e/framework/server_utils_test.go
@@ -0,0 +1,43 @@
+package framework
+
+import (
+	"net"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestMatchIPv4_IPNet_ClassC(t *testing.T) {
+	_, ipNet, err := net.ParseCIDR("192.168.1.0/24")
+	require.NoError(t, err)
+	assert.Equal(t, "192.168.1.0", matchIPv4(ipNet))
+}
+
+func TestMatchIPv4_IPNet_ClassA(t *testing.T) {
+	_, ipNet, err := net.ParseCIDR("10.0.0.0/8")
+	require.NoError(t, err)
+	assert.Equal(t, "10.0.0.0", matchIPv4(ipNet))
+}
+
+func TestMatchIPv4_IPNet_ClassB_NotSelected(t *testing.T) {
+	_, ipNet, err := net.ParseCIDR("172.16.0.0/16")
+	require.NoError(t, err)
+	assert.Empty(t, matchIPv4(ipNet))
+}
+
+func TestMatchIPv4_IPAddr_ClassC(t *testing.T) {
+	addr := &net.IPAddr{IP: net.ParseIP("192.168.1.5")}
+	require.NotNil(t, addr.IP)
+	assert.Equal(t, "192.168.1.5", matchIPv4(addr))
+}
+
+func TestMatchIPv4_IPv6_NotSelected(t *testing.T) {
+	_, ipNet, err := net.ParseCIDR("fd00::1/64")
+	require.NoError(t, err)
+	assert.Empty(t, matchIPv4(ipNet))
+}
+
+func TestMatchIPv4_UnknownAddrType_NotSelected(t *testing.T) {
+	assert.Empty(t, matchIPv4(&net.UDPAddr{IP: net.ParseIP("192.168.1.5"), Port: 1234}))
+}