diff --git a/tests/unit/test_reporters.py b/tests/unit/test_reporters.py
new file mode 100644
index 0000000..f7a7bed
--- /dev/null
+++ b/tests/unit/test_reporters.py
@@ -0,0 +1,190 @@
+"""Tests for reporters."""
+
+import json
+
+import pytest
+
+from depcheck.config import Config
+from depcheck.models import Dependency, PackageManager, ScanResult, Severity, Vulnerability
+from depcheck.reporters.json import JSONReporter
+from depcheck.reporters.terminal import TerminalReporter
+
+
+class TestTerminalReporter:
+    """Tests for terminal reporter."""
+
+    def test_report_empty_result(self):
+        """Test reporting empty result."""
+        config = Config()
+        reporter = TerminalReporter(config)
+
+        result = ScanResult()
+
+        reporter.report(result)
+
+    def test_report_with_outdated_packages(self):
+        """Test reporting with outdated packages."""
+        config = Config()
+        reporter = TerminalReporter(config)
+
+        dep = Dependency(
+            name="express",
+            current_version="4.18.2",
+            latest_version="4.19.2",
+            package_manager=PackageManager.NPM,
+            is_outdated=True,
+        )
+
+        result = ScanResult(dependencies=[dep])
+
+        reporter.report(result)
+
+
+class TestJSONReporter:
+    """Tests for JSON reporter."""
+
+    def test_report_empty_result(self):
+        """Test JSON output for empty result."""
+        config = Config()
+        reporter = JSONReporter(config)
+
+        result = ScanResult()
+        json_output = reporter.report(result)
+
+        data = json.loads(json_output)
+        assert data["summary"]["status"] == "success"
+        assert data["dependencies"] == []
+        assert data["vulnerabilities"] == []
+
+    def test_report_with_dependencies(self):
+        """Test JSON output with dependencies."""
+        config = Config()
+        reporter = JSONReporter(config)
+
+        dep = Dependency(
+            name="express",
+            current_version="4.18.2",
+            latest_version="4.19.2",
+            package_manager=PackageManager.NPM,
+            is_outdated=True,
+            category="dependencies",
+            source_file="package.json",
+        )
+
+        result = ScanResult(dependencies=[dep], source_file="package.json")
+        json_output = reporter.report(result)
+
+        data = json.loads(json_output)
+        assert len(data["dependencies"]) == 1
+        assert data["dependencies"][0]["name"] == "express"
+
+    def test_report_with_vulnerabilities(self):
+        """Test JSON output with vulnerabilities."""
+        config = Config()
+        reporter = JSONReporter(config)
+
+        dep = Dependency(
+            name="lodash",
+            current_version="4.17.20",
+            package_manager=PackageManager.NPM,
+        )
+        vuln = Vulnerability(
+            cve_id="CVE-2021-23337",
+            severity=Severity.HIGH,
+            description="Command Injection",
+            affected_versions="<4.17.21",
+            fixed_version="4.17.21",
+        )
+
+        result = ScanResult(vulnerabilities=[(dep, vuln)])
+        json_output = reporter.report(result)
+
+        data = json.loads(json_output)
+        assert len(data["vulnerabilities"]) == 1
+        assert data["vulnerabilities"][0]["cve_id"] == "CVE-2021-23337"
+
+    def test_get_exit_code_success(self):
+        """Test exit code 0 for clean result."""
+        config = Config(fail_level=Severity.MEDIUM)
+        reporter = JSONReporter(config)
+
+        result = ScanResult()
+        exit_code = reporter.get_exit_code(result)
+
+        assert exit_code == 0
+
+    def test_get_exit_code_with_critical(self):
+        """Test exit code 1 for critical vulnerability."""
+        config = Config(fail_level=Severity.MEDIUM)
+        reporter = JSONReporter(config)
+
+        dep = Dependency(
+            name="lodash",
+            current_version="4.17.20",
+            package_manager=PackageManager.NPM,
+        )
+        vuln = Vulnerability(
+            cve_id="CVE-2020-8203",
+            severity=Severity.CRITICAL,
+            description="Prototype Pollution",
+            affected_versions="<4.17.19",
+        )
+
+        result = ScanResult(vulnerabilities=[(dep, vuln)])
+        exit_code = reporter.get_exit_code(result)
+
+        assert exit_code == 1
+
+    def test_get_exit_code_with_errors(self):
+        """Test exit code 2 for errors."""
+        config = Config()
+        reporter = JSONReporter(config)
+
+        result = ScanResult(scan_errors=["Failed to parse file"])
+        exit_code = reporter.get_exit_code(result)
+
+        assert exit_code == 2
+
+    def test_fail_level_threshold(self):
+        """Test fail level threshold behavior."""
+        config = Config(fail_level=Severity.HIGH)
+        reporter = JSONReporter(config)
+
+        dep = Dependency(
+            name="requests",
+            current_version="2.30.0",
+            package_manager=PackageManager.PIP,
+        )
+        vuln = Vulnerability(
+            cve_id="CVE-2024-35195",
+            severity=Severity.MEDIUM,
+            description="Auth bypass",
+            affected_versions="<2.32.0",
+        )
+
+        result = ScanResult(vulnerabilities=[(dep, vuln)])
+        exit_code = reporter.get_exit_code(result)
+
+        assert exit_code == 0
+
+    def test_exit_code_with_high_fail_level_high(self):
+        """Test exit code when fail level is HIGH and vulnerability is HIGH."""
+        config = Config(fail_level=Severity.HIGH)
+        reporter = JSONReporter(config)
+
+        dep = Dependency(
+            name="lodash",
+            current_version="4.17.20",
+            package_manager=PackageManager.NPM,
+        )
+        vuln = Vulnerability(
+            cve_id="CVE-2021-23337",
+            severity=Severity.HIGH,
+            description="Command Injection",
+            affected_versions="<4.17.21",
+        )
+
+        result = ScanResult(vulnerabilities=[(dep, vuln)])
+        exit_code = reporter.get_exit_code(result)
+
+        assert exit_code == 1