diff --git a/cve_bin_tool/mismatch_data/pypi/arrow/mismatch_relations.yml b/cve_bin_tool/mismatch_data/pypi/arrow/mismatch_relations.yml
new file mode 100644
index 0000000000..cb2b663f47
--- /dev/null
+++ b/cve_bin_tool/mismatch_data/pypi/arrow/mismatch_relations.yml
@@ -0,0 +1,5 @@
+---
+purls:
+  - pkg:pypi/arrow
+invalid_vendors:
+  - apache
\ No newline at end of file
diff --git a/test/test_no_scan_mode.py b/test/test_no_scan_mode.py
new file mode 100644
index 0000000000..776c849c90
--- /dev/null
+++ b/test/test_no_scan_mode.py
@@ -0,0 +1,34 @@
+from cve_bin_tool.sbom_manager.generate import SBOMGenerate
+
+class FakeProduct:
+    def __init__(self, name, version):
+        self.product = name
+        self.version = version
+        self.source = "manual"
+        self.vendor = "UNKNOWN"
+
+def test_generate_sbom_without_scan(tmp_path):
+    output_file = tmp_path / "sbom.json"
+
+    # Fake scan result object
+    fake_product = FakeProduct("zlib", "1.2.11")
+
+    all_product_data = [fake_product]
+    all_cve_data = {}
+
+    sbomgen = SBOMGenerate(
+        all_product_data=all_product_data,
+        all_cve_data=all_cve_data,
+        filename=str(output_file),
+        sbom_type="spdx",
+        sbom_format="tag",
+        sbom_root="CVE_BIN_TOOL_TEST"
+    )
+
+    sbomgen.generate_sbom()
+
+    # Check the output file
+    assert output_file.exists()
+    content = output_file.read_text()
+    assert "zlib" in content
+    assert "1.2.11" in content
\ No newline at end of file