diff --git a/commons-packet/commons-packet-manager/src/test/java/io/mosip/commons/packet/test/util/PacketValidatorTest.java b/commons-packet/commons-packet-manager/src/test/java/io/mosip/commons/packet/test/util/PacketValidatorTest.java
new file mode 100644
index 0000000000..cdc4d2d663
--- /dev/null
+++ b/commons-packet/commons-packet-manager/src/test/java/io/mosip/commons/packet/test/util/PacketValidatorTest.java
@@ -0,0 +1,148 @@
+package io.mosip.commons.packet.test.util;
+
+import io.mosip.commons.packet.audit.AuditLogEntry;
+import io.mosip.commons.packet.constants.PacketManagerConstants;
+import io.mosip.commons.packet.facade.PacketReader;
+import io.mosip.commons.packet.keeper.PacketKeeper;
+import io.mosip.commons.packet.util.IdSchemaUtils;
+import io.mosip.commons.packet.util.PacketValidator;
+import io.mosip.kernel.core.idobjectvalidator.spi.IdObjectValidator;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.springframework.core.env.Environment;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.*;
+
+@RunWith(MockitoJUnitRunner.class)
+public class PacketValidatorTest {
+
+    @InjectMocks
+    private PacketValidator packetValidator;
+
+    @Mock
+    private PacketReader reader;
+
+    @Mock
+    private Environment env;
+
+    @Mock
+    private ObjectMapper mapper;
+
+    @Mock
+    private PacketKeeper packetKeeper;
+
+    @Mock
+    private IdObjectValidator idObjectValidator;
+
+    @Mock
+    private IdSchemaUtils idSchemaUtils;
+
+    @Mock
+    private AuditLogEntry auditLogEntry;
+
+    @Before
+    public void setup() {
+        // env.getProperty(...) returns null
+        // → validateSchema() returns false
+        when(env.getProperty(anyString())).thenReturn(null);
+    }
+
+    @Test
+    public void validateReturnsFalseWhenSchemaValidationFails() throws Exception {
+        // Arrange: prevent NPE
+        when(idSchemaUtils.getIdschemaVersionFromMappingJson()).thenReturn("schemaVersion");
+        when(reader.getField(any(), any(), any(), any(), anyBoolean())).thenReturn("1.0");
+
+        // env property null -> schema validation returns false
+        when(env.getProperty(anyString())).thenReturn(null);
+
+        // Act
+        boolean result = packetValidator.validate("123", "source", "process");
+
+        // Assert
+        assertFalse(result);
+
+        verify(auditLogEntry)
+                .addAudit(contains("failed"), any(), any(), any(), any(), any(), eq("123"));
+
+        verify(packetKeeper, never()).getPacket(any());
+    }
+
+    @Test
+    public void validateReturnsTrueWhenSchemaPassesAndFileValidationPasses() throws Exception {
+        // ---- prevent earlier NPEs ----
+        when(idSchemaUtils.getIdschemaVersionFromMappingJson()).thenReturn("schemaVersion");
+        when(reader.getField(any(), any(), any(), any(), anyBoolean())).thenReturn("1.0");
+
+        Map<String, String> fieldsMap = new HashMap<>();
+        fieldsMap.put(PacketManagerConstants.IDSCHEMA_VERSION, "1.0");
+
+        when(idSchemaUtils.getDefaultFields(anyDouble())).thenReturn(new ArrayList<>());
+        when(reader.getFields(any(), any(), any(), any(), anyBoolean())).thenReturn(fieldsMap);
+
+        when(env.getProperty(anyString())).thenReturn("field1,field2");
+        when(idObjectValidator.validateIdObject(any(), any(), any())).thenReturn(true);
+
+        // ---- spy only public method ----
+        PacketValidator spyValidator = spy(packetValidator);
+        doReturn(true)
+                .when(spyValidator)
+                .fileAndChecksumValidation(any(), any(), any());
+
+        // ---- act ----
+        boolean result = spyValidator.validate("123", "source", "process");
+
+        // ---- assert ----
+        assertTrue(result);
+    }
+
+    @Test
+    public void validateReturnsFalseWhenFileValidationFails() throws Exception {
+
+        // ---- Schema validation MUST pass ----
+        when(idSchemaUtils.getIdschemaVersionFromMappingJson())
+                .thenReturn(PacketManagerConstants.IDSCHEMA_VERSION);
+
+        when(reader.getField(any(), any(), any(), any(), anyBoolean()))
+                .thenReturn("1.0");
+
+        Map<String, String> fieldsMap = new HashMap<>();
+        fieldsMap.put(PacketManagerConstants.IDSCHEMA_VERSION, "1.0");
+
+        when(idSchemaUtils.getDefaultFields(anyDouble()))
+                .thenReturn(new ArrayList<>());
+
+        when(reader.getFields(any(), any(), any(), any(), anyBoolean()))
+                .thenReturn(fieldsMap);
+
+        when(env.getProperty(anyString()))
+                .thenReturn("field1,field2");
+
+        when(idObjectValidator.validateIdObject(any(), any(), any()))
+                .thenReturn(true);
+
+        // ---- Force file validation to fail ----
+        PacketValidator spyValidator = spy(packetValidator);
+        doReturn(false)
+                .when(spyValidator)
+                .fileAndChecksumValidation(any(), any(), any());
+
+        // ---- Act ----
+        boolean result = spyValidator.validate("123", "source", "process");
+
+        // ---- Assert ----
+        assertFalse(result);
+    }
+
+}