diff --git a/src/test/unit/cms_unittest.cc b/src/test/unit/cms_unittest.cc
index 6c8e1c79b..cc3833e17 100644
--- a/src/test/unit/cms_unittest.cc
+++ b/src/test/unit/cms_unittest.cc
@@ -52,7 +52,19 @@ static int displayPortTestRelease(displayPort_t *displayPort)
     return 0;
 }
 
-static int displayPortTestClear(displayPort_t *displayPort)
+static int displayPortTestClearScreen(displayPort_t *displayPort)
+{
+    UNUSED(displayPort);
+    return 0;
+}
+
+static int displayPortTestDrawScreen(displayPort_t *displayPort)
+{
+    UNUSED(displayPort);
+    return 0;
+}
+
+static int displayPortTestScreenSize(const displayPort_t *displayPort)
 {
     UNUSED(displayPort);
     return 0;
@@ -67,6 +79,21 @@ static int displayPortTestWrite(displayPort_t *displayPort, uint8_t x, uint8_t y
     return 0;
 }
 
+static int displayPortTestWriteChar(displayPort_t *displayPort, uint8_t x, uint8_t y, uint8_t c)
+{
+    UNUSED(displayPort);
+    UNUSED(x);
+    UNUSED(y);
+    UNUSED(c);
+    return 0;
+}
+
+static bool displayPortTestIsTransferInProgress(const displayPort_t *displayPort)
+{
+    UNUSED(displayPort);
+    return 0;
+}
+
 static int displayPortTestHeartbeat(displayPort_t *displayPort)
 {
     UNUSED(displayPort);
@@ -87,8 +114,11 @@ static uint32_t displayPortTestTxBytesFree(const displayPort_t *displayPort)
 static const displayPortVTable_t testDisplayPortVTable = {
     .grab = displayPortTestGrab,
     .release = displayPortTestRelease,
-    .clearScreen = displayPortTestClear,
+    .clearScreen = displayPortTestClearScreen,
+    .drawScreen = displayPortTestDrawScreen,
     .write = displayPortTestWrite,
+    .writeChar = displayPortTestWriteChar,
+    .isTransferInProgress = displayPortTestIsTransferInProgress,
     .heartbeat = displayPortTestHeartbeat,
     .resync = displayPortTestResync,
     .txBytesFree = displayPortTestTxBytesFree