diff --git a/sdk/src/test/kotlin/org/onflow/flow/sdk/models/FlowNodeVersionInfoTest.kt b/sdk/src/test/kotlin/org/onflow/flow/sdk/models/FlowNodeVersionInfoTest.kt
new file mode 100644
index 0000000..d0cf367
--- /dev/null
+++ b/sdk/src/test/kotlin/org/onflow/flow/sdk/models/FlowNodeVersionInfoTest.kt
@@ -0,0 +1,117 @@
+package org.onflow.flow.sdk.models
+
+import com.google.protobuf.UnsafeByteOperations
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
+import org.onflow.flow.sdk.FlowCompatibleRange
+import org.onflow.flow.sdk.FlowNodeVersionInfo
+import org.onflow.protobuf.entities.NodeVersionInfoOuterClass
+
+class FlowNodeVersionInfoTest {
+    @Test
+    fun `FlowNodeVersionInfo builder`() {
+        val sporkId = byteArrayOf(0x01, 0x02)
+        val versionInfo = FlowNodeVersionInfo(
+            semver = "1.0.0",
+            commit = "commit1",
+            sporkId = sporkId,
+            protocolVersion = 1L,
+            sporkRootBlockHeight = 100L,
+            nodeRootBlockHeight = 200L,
+            compatibleRange = null
+        )
+
+        // Test builder function
+        val builder = versionInfo.builder()
+        assertEquals(versionInfo.semver, builder.semver)
+        assertEquals(versionInfo.commit, builder.commit)
+        assertArrayEquals(versionInfo.sporkId, builder.sporkId.toByteArray())
+        assertEquals(versionInfo.protocolVersion, builder.protocolVersion)
+        assertEquals(versionInfo.sporkRootBlockHeight, builder.sporkRootBlockHeight)
+        assertEquals(versionInfo.nodeRootBlockHeight, builder.nodeRootBlockHeight)
+    }
+
+    @Test
+    fun `FlowNodeVersionInfo of method`() {
+        val sporkId = byteArrayOf(0x01, 0x02)
+        val protoVersionInfo = NodeVersionInfoOuterClass.NodeVersionInfo.newBuilder()
+            .setSemver("1.0.0")
+            .setCommit("commit1")
+            .setSporkId(UnsafeByteOperations.unsafeWrap(sporkId))
+            .setProtocolVersion(1L)
+            .setSporkRootBlockHeight(100L)
+            .setNodeRootBlockHeight(200L)
+            .build()
+
+        // Test of() method
+        val versionInfo = FlowNodeVersionInfo.of(protoVersionInfo)
+
+        assertEquals("1.0.0", versionInfo.semver)
+        assertEquals("commit1", versionInfo.commit)
+        assertArrayEquals(sporkId, versionInfo.sporkId)
+        assertEquals(1L, versionInfo.protocolVersion)
+        assertEquals(100L, versionInfo.sporkRootBlockHeight)
+        assertEquals(200L, versionInfo.nodeRootBlockHeight)
+        assertNull(versionInfo.compatibleRange)
+    }
+
+    @Test
+    fun `FlowCompatibleRange equality and hashcode`() {
+        val range1 = FlowCompatibleRange(startHeight = 1L, endHeight = 10L)
+        val range2 = FlowCompatibleRange(startHeight = 1L, endHeight = 10L)
+        val range3 = FlowCompatibleRange(startHeight = 2L, endHeight = 15L)
+
+        // Test equality
+        assertEquals(range1, range2)
+        assertNotEquals(range1, range3)
+
+        // Test hashcode
+        assertEquals(range1.hashCode(), range2.hashCode())
+        assertNotEquals(range1.hashCode(), range3.hashCode())
+    }
+
+    @Test
+    fun `FlowNodeVersionInfo equality and hashcode`() {
+        val sporkId1 = byteArrayOf(0x01, 0x02)
+        val sporkId2 = byteArrayOf(0x01, 0x02)
+        val sporkId3 = byteArrayOf(0x03, 0x04)
+
+        val versionInfo1 = FlowNodeVersionInfo(
+            semver = "1.0.0",
+            commit = "commit1",
+            sporkId = sporkId1,
+            protocolVersion = 1L,
+            sporkRootBlockHeight = 100L,
+            nodeRootBlockHeight = 200L,
+            compatibleRange = FlowCompatibleRange(startHeight = 1L, endHeight = 10L)
+        )
+
+        val versionInfo2 = FlowNodeVersionInfo(
+            semver = "1.0.0",
+            commit = "commit1",
+            sporkId = sporkId2,
+            protocolVersion = 1L,
+            sporkRootBlockHeight = 100L,
+            nodeRootBlockHeight = 200L,
+            compatibleRange = FlowCompatibleRange(startHeight = 1L, endHeight = 10L)
+        )
+
+        val versionInfo3 = FlowNodeVersionInfo(
+            semver = "2.0.0",
+            commit = "commit2",
+            sporkId = sporkId3,
+            protocolVersion = 2L,
+            sporkRootBlockHeight = 150L,
+            nodeRootBlockHeight = 250L,
+            compatibleRange = null
+        )
+
+        // Test equality
+        assertEquals(versionInfo1, versionInfo2)
+        assertNotEquals(versionInfo1, versionInfo3)
+
+        // Test hashcode
+        assertEquals(versionInfo1.hashCode(), versionInfo2.hashCode())
+        assertNotEquals(versionInfo1.hashCode(), versionInfo3.hashCode())
+    }
+}