diff --git a/tools/compare_cts_reports/test_aggregate_cts_reports.py b/tools/compare_cts_reports/test_aggregate_cts_reports.py
new file mode 100755
index 000000000..0d17868b8
--- /dev/null
+++ b/tools/compare_cts_reports/test_aggregate_cts_reports.py
@@ -0,0 +1,121 @@
+#!/usr/bin/python3
+#
+# Copyright (C) 2023 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+import unittest
+import aggregate_cts_reports
+
+
+class TestParse(unittest.TestCase):
+
+  def test_aggregate(self):
+    report_files = ['testdata/test_result_1.xml', 'testdata/test_result_2.xml']
+    report = aggregate_cts_reports.aggregate_cts_reports(report_files)
+
+    self.check_ctsreport(report)
+
+  def check_ctsreport(self, report):
+    self.assertEqual(
+        report.get_test_status('module_1', 'arm64-v8a', 'testcase_1', 'test_1'),
+        'pass',
+    )
+    self.assertEqual(
+        report.get_test_status('module_1', 'arm64-v8a', 'testcase_1', 'test_2'),
+        'fail',
+    )
+    self.assertEqual(
+        report.get_test_status('module_2', 'arm64-v8a', 'testcase_2', 'test_3'),
+        'pass',
+    )
+    self.assertEqual(
+        report.get_test_status('module_2', 'arm64-v8a', 'testcase_3', 'test_4'),
+        'ASSUMPTION_FAILURE',
+    )
+    self.assertEqual(
+        report.get_test_status('module_2', 'arm64-v8a', 'testcase_3', 'test_5'),
+        'fail',
+    )
+    self.assertEqual(
+        report.get_test_status('module_2', 'arm64-v8a', 'testcase_4', 'test_6'),
+        'pass',
+    )
+    self.assertEqual(
+        report.get_test_status('module_2', 'arm64-v8a', 'testcase_4', 'test_7'),
+        'pass',
+    )
+    self.assertEqual(
+        report.get_test_status('module_2', 'arm64-v8a', 'testcase_4', 'test_8'),
+        'fail',
+    )
+    self.assertEqual(
+        report.get_test_status('module_3', 'arm64-v8a', 'testcase_5', 'test_9'),
+        'pass',
+    )
+    self.assertEqual(
+        report.get_test_status(
+            'module_3', 'arm64-v8a', 'testcase_5', 'test_10'
+        ),
+        'TEST_ERROR',
+    )
+    self.assertEqual(
+        report.get_test_status(
+            'module_3', 'arm64-v8a', 'testcase_5', 'test_11'
+        ),
+        'pass',
+    )
+    self.assertEqual(
+        report.get_test_status(
+            'module_4', 'arm64-v8a', 'testcase_6', 'test_12'
+        ),
+        'fail',
+    )
+
+    self.assertEqual(report.info['build_model'], 'this_model')
+    self.assertEqual(report.info['build_id'], '1412')
+    self.assertEqual(report.info['build_fingerprint'], 'this_build_fingerprint')
+    self.assertEqual(report.info['build_device'], 'this_device')
+    self.assertEqual(report.info['build_version_sdk'], '34')
+    self.assertEqual(report.info['build_version_security_patch'], '2023-06-05')
+    self.assertEqual(report.info['build_board'], 'this_board')
+    self.assertEqual(report.info['build_type'], 'userdebug')
+    self.assertEqual(report.info['build_version_release'], '14')
+    self.assertEqual(report.info['suite_name'], 'CTS')
+    self.assertEqual(report.info['suite_version'], '14_r1')
+    self.assertEqual(report.info['suite_plan'], 'cts')
+    self.assertEqual(report.info['suite_build_number'], '1234567')
+
+    module_summaries = report.module_summaries
+    summary = module_summaries['module_1']['arm64-v8a']
+    self.assertEqual(summary.counter['pass'], 1)
+    self.assertEqual(summary.counter['fail'], 1)
+
+    summary = module_summaries['module_2']['arm64-v8a']
+    self.assertEqual(summary.counter['pass'], 3)
+    self.assertEqual(
+        summary.counter['ASSUMPTION_FAILURE'],
+        1,
+    )
+    self.assertEqual(summary.counter['fail'], 2)
+
+    summary = module_summaries['module_3']['arm64-v8a']
+    self.assertEqual(summary.counter['pass'], 2)
+    self.assertEqual(summary.counter['TEST_ERROR'], 1)
+
+    summary = module_summaries['module_4']['arm64-v8a']
+    self.assertEqual(summary.counter['fail'], 1)
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/tools/compare_cts_reports/test_parse_cts_report.py b/tools/compare_cts_reports/test_parse_cts_report.py
new file mode 100755
index 000000000..efa60ab08
--- /dev/null
+++ b/tools/compare_cts_reports/test_parse_cts_report.py
@@ -0,0 +1,155 @@
+#!/usr/bin/python3
+#
+# Copyright (C) 2023 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+import filecmp
+import os
+import tempfile
+import unittest
+import parse_cts_report
+
+
+class TestParse(unittest.TestCase):
+
+  def test_set(self):
+    info = {}
+    report = parse_cts_report.CtsReport(info)
+    test_item = ('module', 'abi', 'class', 'test')
+
+    report.set_test_status(*test_item, 'IGNORED')
+    report.set_test_status(*test_item, 'fail')
+
+    self.assertEqual(report.get_test_status(*test_item), 'IGNORED')
+
+    report.set_test_status(*test_item, 'pass')
+
+    self.assertEqual(report.get_test_status(*test_item), 'pass')
+
+  def test_parse_xml(self):
+    report_file = 'testdata/test_result_1.xml'
+    report = parse_cts_report.parse_report_file(report_file)
+
+    self.check_ctsreport(report)
+
+  def test_parse_zip(self):
+    report_file = 'testdata/report.zip'
+    report = parse_cts_report.parse_report_file(report_file)
+
+    self.check_ctsreport(report)
+
+  def check_ctsreport(self, report):
+    self.assertEqual(
+        report.get_test_status('module_1', 'arm64-v8a', 'testcase_1', 'test_1'),
+        'pass',
+    )
+    self.assertEqual(
+        report.get_test_status('module_1', 'arm64-v8a', 'testcase_1', 'test_2'),
+        'fail',
+    )
+    self.assertEqual(
+        report.get_test_status('module_2', 'arm64-v8a', 'testcase_2', 'test_3'),
+        'pass',
+    )
+    self.assertEqual(
+        report.get_test_status('module_2', 'arm64-v8a', 'testcase_3', 'test_4'),
+        'ASSUMPTION_FAILURE',
+    )
+    self.assertEqual(
+        report.get_test_status('module_2', 'arm64-v8a', 'testcase_3', 'test_5'),
+        'fail',
+    )
+    self.assertEqual(
+        report.get_test_status('module_2', 'arm64-v8a', 'testcase_4', 'test_6'),
+        'IGNORED',
+    )
+    self.assertEqual(
+        report.get_test_status('module_2', 'arm64-v8a', 'testcase_4', 'test_7'),
+        'fail',
+    )
+    self.assertEqual(
+        report.get_test_status('module_2', 'arm64-v8a', 'testcase_4', 'test_8'),
+        'TEST_STATUS_UNSPECIFIED',
+    )
+    self.assertEqual(
+        report.get_test_status('module_3', 'arm64-v8a', 'testcase_5', 'test_9'),
+        'pass',
+    )
+    self.assertEqual(
+        report.get_test_status(
+            'module_3', 'arm64-v8a', 'testcase_5', 'test_10'
+        ),
+        'TEST_ERROR',
+    )
+
+    self.assertEqual(report.info['build_model'], 'this_model')
+    self.assertEqual(report.info['build_id'], '1412')
+    self.assertEqual(report.info['build_fingerprint'], 'this_build_fingerprint')
+    self.assertEqual(report.info['build_device'], 'this_device')
+    self.assertEqual(report.info['build_version_sdk'], '34')
+    self.assertEqual(report.info['build_version_security_patch'], '2023-06-05')
+    self.assertEqual(report.info['build_board'], 'this_board')
+    self.assertEqual(report.info['build_type'], 'userdebug')
+    self.assertEqual(report.info['build_version_release'], '14')
+    self.assertEqual(report.info['suite_name'], 'CTS')
+    self.assertEqual(report.info['suite_version'], '14_r1')
+    self.assertEqual(report.info['suite_plan'], 'cts')
+    self.assertEqual(report.info['suite_build_number'], '1234567')
+
+    module_summaries = report.module_summaries
+    summary = module_summaries['module_1']['arm64-v8a']
+    self.assertEqual(summary.counter['pass'], 1)
+    self.assertEqual(summary.counter['fail'], 1)
+
+    summary = module_summaries['module_2']['arm64-v8a']
+    self.assertEqual(summary.counter['pass'], 1)
+    self.assertEqual(summary.counter['IGNORED'], 1)
+    self.assertEqual(
+        summary.counter['ASSUMPTION_FAILURE'],
+        1,
+    )
+    self.assertEqual(summary.counter['fail'], 2)
+    self.assertEqual(
+        summary.counter['TEST_STATUS_UNSPECIFIED'],
+        1,
+    )
+
+    summary = module_summaries['module_3']['arm64-v8a']
+    self.assertEqual(summary.counter['pass'], 1)
+    self.assertEqual(summary.counter['TEST_ERROR'], 1)
+
+  def test_output(self):
+    report_file = 'testdata/test_result_1.xml'
+    report = parse_cts_report.parse_report_file(report_file)
+
+    with tempfile.TemporaryDirectory() as temp_dir:
+      report.output_files(temp_dir)
+
+      parsed_info_path = os.path.join(temp_dir, 'info.json')
+      parsed_result_path = os.path.join(temp_dir, 'result.csv')
+      parsed_summary_path = os.path.join(temp_dir, 'summary.csv')
+
+      files = [parsed_info_path, parsed_result_path, parsed_summary_path]
+
+      match, mismatch, errors = filecmp.cmpfiles(
+          'testdata/output', temp_dir, files
+      )
+
+      self.assertEqual(match, files)
+      self.assertEqual(mismatch, [])
+      self.assertEqual(errors, [])
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/tools/compare_cts_reports/testdata/output/info_1.json b/tools/compare_cts_reports/testdata/output/info_1.json
new file mode 100644
index 000000000..b70901b02
--- /dev/null
+++ b/tools/compare_cts_reports/testdata/output/info_1.json
@@ -0,0 +1,16 @@
+{
+  "source_path": "testdata/test_result_1.xml",
+  "build_model": "this_model",
+  "build_id": "1412",
+  "build_fingerprint": "this_build_fingerprint",
+  "build_device": "this_device",
+  "build_version_sdk": "34",
+  "build_version_security_patch": "2023-06-05",
+  "build_board": "this_board",
+  "build_type": "userdebug",
+  "build_version_release": "14",
+  "suite_name": "CTS",
+  "suite_version": "14_r1",
+  "suite_plan": "cts",
+  "suite_build_number": "1234567"
+}
\ No newline at end of file
diff --git a/tools/compare_cts_reports/testdata/output/result_1.csv b/tools/compare_cts_reports/testdata/output/result_1.csv
new file mode 100644
index 000000000..b8e6e6703
--- /dev/null
+++ b/tools/compare_cts_reports/testdata/output/result_1.csv
@@ -0,0 +1,11 @@
+module_name,abi,class_name,test_name,result
+module_1,arm64-v8a,testcase_1,test_1,pass
+module_1,arm64-v8a,testcase_1,test_2,fail
+module_2,arm64-v8a,testcase_2,test_3,pass
+module_2,arm64-v8a,testcase_3,test_4,ASSUMPTION_FAILURE
+module_2,arm64-v8a,testcase_3,test_5,fail
+module_2,arm64-v8a,testcase_4,test_6,IGNORED
+module_2,arm64-v8a,testcase_4,test_7,fail
+module_2,arm64-v8a,testcase_4,test_8,TEST_STATUS_UNSPECIFIED
+module_3,arm64-v8a,testcase_5,test_9,pass
+module_3,arm64-v8a,testcase_5,test_10,TEST_ERROR
diff --git a/tools/compare_cts_reports/testdata/output/summary_1.csv b/tools/compare_cts_reports/testdata/output/summary_1.csv
new file mode 100644
index 000000000..e794f4f88
--- /dev/null
+++ b/tools/compare_cts_reports/testdata/output/summary_1.csv
@@ -0,0 +1,4 @@
+module_name,abi,pass,IGNORED,ASSUMPTION_FAILURE,fail,TEST_ERROR,TEST_STATUS_UNSPECIFIED
+module_1,arm64-v8a,1,0,0,1,0,0
+module_2,arm64-v8a,1,1,1,2,0,1
+module_3,arm64-v8a,1,0,0,0,1,0
diff --git a/tools/compare_cts_reports/testdata/report.zip b/tools/compare_cts_reports/testdata/report.zip
new file mode 100644
index 000000000..00f665992
Binary files /dev/null and b/tools/compare_cts_reports/testdata/report.zip differ
diff --git a/tools/compare_cts_reports/testdata/test_result_1.xml b/tools/compare_cts_reports/testdata/test_result_1.xml
new file mode 100644
index 000000000..e75e1d6e3
--- /dev/null
+++ b/tools/compare_cts_reports/testdata/test_result_1.xml
@@ -0,0 +1,41 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<Result suite_name="CTS" suite_plan="cts" suite_build_number="1234567" start_display="Tue Aug 01 08:34:01 CST 2023" suite_version="14_r1">
+	<Build build_model="this_model" build_device="this_device" build_id="1412" build_version_sdk="34" build_version_security_patch="2023-06-05" build_board="this_board" build_type="userdebug" build_version_release="14" build_fingerprint="this_build_fingerprint" />
+	<Summary pass="3" failed="3" modules_done="3" modules_total="4" />
+	<Module name="module_1" abi="arm64-v8a" done="true" pass="1" total_tests="2">
+		<TestCase name="testcase_1">
+			<Test result="pass" name="test_1">
+			</Test>
+			<Test result="fail" name="test_2">
+			</Test>
+		</TestCase>
+	</Module>
+	<Module name="module_2" abi="arm64-v8a" done="true" pass="1" total_tests="6">
+		<TestCase name="testcase_2">
+			<Test result="pass" name="test_3">
+			</Test>
+		</TestCase>
+		<TestCase name="testcase_3">
+			<Test result="ASSUMPTION_FAILURE" name="test_4">
+			</Test>
+			<Test result="fail" name="test_5">
+			</Test>
+		</TestCase>
+		<TestCase name="testcase_4">
+			<Test result="IGNORED" name="test_6">
+			</Test>
+			<Test result="fail" name="test_7">
+			</Test>
+			<Test result="TEST_STATUS_UNSPECIFIED" name="test_8">
+			</Test>
+		</TestCase>
+	</Module>
+	<Module name="module_3" abi="arm64-v8a" done="true" pass="1" total_tests="2">
+		<TestCase name="testcase_5">
+			<Test result="pass" name="test_9">
+			</Test>
+			<Test result="TEST_ERROR" name="test_10">
+			</Test>
+		</TestCase>
+	</Module>
+</Result>
diff --git a/tools/compare_cts_reports/testdata/test_result_2.xml b/tools/compare_cts_reports/testdata/test_result_2.xml
new file mode 100644
index 000000000..416fbfdd4
--- /dev/null
+++ b/tools/compare_cts_reports/testdata/test_result_2.xml
@@ -0,0 +1,45 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<Result suite_name="CTS" suite_plan="cts" suite_build_number="7654321" start_display="Tue Aug 01 08:34:01 CST 2023" suite_version="14_r1">
+	<Build build_model="that_model" build_device="that_device" build_id="0621" build_version_sdk="34" build_version_security_patch="2023-06-05" build_board="that_board" build_type="userdebug" build_version_release="14" build_fingerprint="this_build_fingerprint" />
+	<Summary pass="4" failed="4" modules_done="4" modules_total="4" />
+	<Module name="module_1" abi="arm64-v8a" done="true" pass="1" total_tests="2">
+		<TestCase name="testcase_1">
+			<Test result="pass" name="test_1">
+			</Test>
+			<Test result="fail" name="test_2">
+			</Test>
+		</TestCase>
+	</Module>
+	<Module name="module_2" abi="arm64-v8a" done="true" pass="2" total_tests="6">
+		<TestCase name="testcase_2">
+			<Test result="IGNORED" name="test_3">
+			</Test>
+		</TestCase>
+		<TestCase name="testcase_3">
+			<Test result="fail" name="test_4">
+			</Test>
+			<Test result="TEST_STATUS_UNSPECIFIED" name="test_5">
+			</Test>
+		</TestCase>
+		<TestCase name="testcase_4">
+			<Test result="pass" name="test_6">
+			</Test>
+			<Test result="pass" name="test_7">
+			</Test>
+			<Test result="fail" name="test_8">
+			</Test>
+		</TestCase>
+	</Module>
+	<Module name="module_3" abi="arm64-v8a" done="true" pass="1" total_tests="1">
+		<TestCase name="testcase_5">
+			<Test result="pass" name="test_11">
+			</Test>
+		</TestCase>
+	</Module>
+	<Module name="module_4" abi="arm64-v8a" done="true" pass="0" total_tests="1">
+		<TestCase name="testcase_6">
+			<Test result="fail" name="test_12">
+			</Test>
+		</TestCase>
+	</Module>
+</Result>