diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c
index a0028aa10a0f..01beabc31546 100644
--- a/drivers/net/phy/dp83867.c
+++ b/drivers/net/phy/dp83867.c
@@ -317,6 +317,16 @@ static int dp83867_config_init(struct phy_device *phydev)
 		phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG, val);
 	}
 
+	/* Check if the PHY is an internal testing mode.
+	 * This mode can cause connection problems.
+	 */
+	val = phy_read_mmd_indirect(phydev, DP83867_CFG4, DP83867_DEVADDR);
+	if (val & BIT(7)) {
+		val &= ~BIT(7);
+		phy_write_mmd_indirect(phydev, DP83867_CFG4, DP83867_DEVADDR,
+					val);
+	}
+
 	/* Disable FORCE_LINK_GOOD */
 	val = phy_read(phydev, MII_DP83867_PHYCTRL);
 	if (val & MII_DP83867_PHYCTRL_FORCE_LINK_GOOD) {