diff --git a/library/aws/tests/inspector/test_inspector_lambda_standard_scan_enabled.py b/library/aws/tests/inspector/test_inspector_lambda_standard_scan_enabled.py
new file mode 100644
index 00000000..f6c68e1a
--- /dev/null
+++ b/library/aws/tests/inspector/test_inspector_lambda_standard_scan_enabled.py
@@ -0,0 +1,127 @@
+import pytest
+from unittest.mock import MagicMock
+from botocore.exceptions import ClientError
+from tevico.engine.entities.report.check_model import (
+    CheckStatus, CheckMetadata, Remediation, RemediationCode, RemediationRecommendation
+)
+from library.aws.checks.inspector.inspector_lambda_standard_scan_enabled import inspector_lambda_standard_scan_enabled
+
+
+class TestInspectorLambdaStandardScanEnabled:
+    def setup_method(self):
+        """Initialize metadata, check, and mock AWS clients for each test."""
+        metadata = CheckMetadata(
+            Provider="aws",
+            CheckID="inspector_lambda_standard_scan_enabled",
+            CheckTitle="Ensure Inspector Lambda standard scan is enabled",
+            CheckType=["security"],
+            ServiceName="inspector2",
+            SubServiceName="lambda",
+            ResourceIdTemplate="",
+            Severity="high",
+            ResourceType="account",
+            Risk="If Inspector Lambda scans are not enabled, you might miss vulnerabilities in Lambda functions.",
+            RelatedUrl="https://docs.aws.amazon.com/inspector/latest/user/lambda-scan.html",
+            Remediation=Remediation(
+                Code=RemediationCode(
+                    CLI="aws inspector2 enable --resource-types LAMBDA",
+                    Terraform=None,
+                    NativeIaC=None,
+                    Other=None,
+                ),
+                Recommendation=RemediationRecommendation(
+                    Text="Enable Inspector2 Lambda scanning.",
+                    Url="https://docs.aws.amazon.com/inspector/latest/user/lambda-scan.html"
+                )
+            ),
+            Description="Checks whether Inspector Lambda standard scan is enabled.",
+            Categories=["security", "compliance"]
+        )
+
+        self.check = inspector_lambda_standard_scan_enabled(metadata)
+        self.mock_session = MagicMock()
+        self.mock_inspector_client = MagicMock()
+        self.mock_sts_client = MagicMock()
+
+        self.mock_session.client.side_effect = lambda service: {
+            "inspector2": self.mock_inspector_client,
+            "sts": self.mock_sts_client
+        }[service]
+
+        self.mock_sts_client.get_caller_identity.return_value = {"Account": "123456789012"}
+
+    def set_inspector_response(self, status):
+        """Helper to set the inspector2 batch_get_account_status response."""
+        self.mock_inspector_client.batch_get_account_status.return_value = {
+            "accounts": [{
+                "resourceState": {
+                    "lambda": {
+                        "status": status
+                    }
+                }
+            }]
+        }
+
+    def test_lambda_scan_enabled(self):
+        """Inspector Lambda scan is enabled."""
+        self.set_inspector_response("ENABLED")
+        report = self.check.execute(self.mock_session)
+
+        assert report.status == CheckStatus.PASSED
+        assert any(r.summary and "enabled" in r.summary.lower() for r in report.resource_ids_status)
+
+    def test_lambda_scan_disabled(self):
+        """Inspector Lambda scan is disabled."""
+        self.set_inspector_response("DISABLED")
+        report = self.check.execute(self.mock_session)
+
+        assert report.status == CheckStatus.FAILED
+        assert any(r.summary and "not enabled" in r.summary.lower() for r in report.resource_ids_status)
+
+    def test_lambda_scan_suspended(self):
+        """Inspector Lambda scan is suspended."""
+        self.set_inspector_response("SUSPENDED")
+        report = self.check.execute(self.mock_session)
+
+        assert report.status == CheckStatus.FAILED
+        assert any(r.summary and "suspended" in r.summary.lower() for r in report.resource_ids_status)
+
+    def test_lambda_scan_unknown_status(self):
+        """Inspector Lambda scan is in transitional state (e.g., TRANSITIONING)."""
+        self.set_inspector_response("TRANSITIONING")
+        report = self.check.execute(self.mock_session)
+
+        assert report.status == CheckStatus.UNKNOWN
+        assert any(r.summary and "transitional" in r.summary.lower() for r in report.resource_ids_status)
+
+    def test_lambda_resource_key_missing(self):
+        """Inspector2 returned no 'lambda' key in resourceState."""
+        self.mock_inspector_client.batch_get_account_status.return_value = {
+            "accounts": [{"resourceState": {}}]  # lambda key missing
+        }
+
+        report = self.check.execute(self.mock_session)
+
+        assert report.status == CheckStatus.UNKNOWN
+        assert any("transitional" in r.summary.lower() or r.status == CheckStatus.UNKNOWN for r in report.resource_ids_status)
+
+    def test_lambda_scan_client_error(self):
+        """Simulate AWS ClientError (e.g., Access Denied)."""
+        self.mock_inspector_client.batch_get_account_status.side_effect = ClientError(
+            error_response={"Error": {"Code": "AccessDenied", "Message": "Access Denied"}},
+            operation_name="BatchGetAccountStatus"
+        )
+
+        report = self.check.execute(self.mock_session)
+
+        assert report.status == CheckStatus.UNKNOWN
+        assert any("access denied" in r.summary.lower() for r in report.resource_ids_status)
+
+    def test_api_failure(self):
+        """Simulate generic exception while calling Inspector2 API."""
+        self.mock_inspector_client.batch_get_account_status.side_effect = Exception("API error")
+
+        report = self.check.execute(self.mock_session)
+
+        assert report.status == CheckStatus.UNKNOWN
+        assert any(r.summary and "error checking" in r.summary.lower() for r in report.resource_ids_status)