diff --git a/core/src/test/java/org/apache/struts2/action/CspReportActionTest.java b/core/src/test/java/org/apache/struts2/action/CspReportActionTest.java
new file mode 100644
index 000000000..eadca87c8
--- /dev/null
+++ b/core/src/test/java/org/apache/struts2/action/CspReportActionTest.java
@@ -0,0 +1,112 @@
+package org.apache.struts2.action;
+
+import com.opensymphony.xwork2.XWorkTestCase;
+import org.apache.struts2.interceptor.csp.CspSettings;
+import org.springframework.http.HttpMethod;
+import org.springframework.mock.web.MockHttpServletRequest;
+import org.springframework.mock.web.MockHttpServletResponse;
+
+public class CspReportActionTest extends XWorkTestCase {
+  public void testWhenMethodNotPost_thenReportNotProcessed() {
+    for (HttpMethod method : HttpMethod.values()) {
+      TestCspReportAction cspReportAction = new TestCspReportAction();
+
+      // only expect a report if the method is post
+      int expectedReports = method == HttpMethod.POST ? 1 : 0;
+
+      MockHttpServletRequest request = new MockHttpServletRequest(method.toString(), "/requestUri");
+      request.setContent("someSampleContent".getBytes());
+      request.setContentType(CspSettings.CSP_REPORT_TYPE);
+
+      cspReportAction.withServletRequest(request);
+
+      assertEquals(
+          "Unexpected behaviour with method " + method,
+          expectedReports,
+          cspReportAction.actualNumberOfReports
+      );
+
+      assertCorrectResponseStatusCode(cspReportAction);
+    }
+  }
+
+  public void testWhenNoContentLength_thenReportNotProcessed() {
+    TestCspReportAction cspReportAction = new TestCspReportAction();
+    MockHttpServletRequest request = new MockHttpServletRequest("POST", "/requestUri");
+    request.setContentType(CspSettings.CSP_REPORT_TYPE);
+
+    cspReportAction.withServletRequest(request);
+
+    assertEquals(
+        "Report request with empty body should not be processed",
+        0,
+        cspReportAction.actualNumberOfReports
+    );
+
+    assertCorrectResponseStatusCode(cspReportAction);
+  }
+
+  public void testWhenContentTypeNotCsp_thenReportNotProcessed() {
+    TestCspReportAction cspReportAction = new TestCspReportAction();
+    MockHttpServletRequest request = new MockHttpServletRequest("POST", "/requestUri");
+    request.setContent("someSampleContent".getBytes());
+    request.setContentType("application/json");
+
+    cspReportAction.withServletRequest(request);
+
+    assertEquals(
+        "Report request with wrong content type should not be processed",
+        0,
+        cspReportAction.actualNumberOfReports
+    );
+
+    assertCorrectResponseStatusCode(cspReportAction);
+  }
+
+  public void testWhenValidReportRequest_thenReportProcessed() {
+    TestCspReportAction cspReportAction = new TestCspReportAction();
+    String sampleReport = "someSampleContent";
+
+    MockHttpServletRequest request = new MockHttpServletRequest("POST", "/requestUri");
+    request.setContent(sampleReport.getBytes());
+    request.setContentType(CspSettings.CSP_REPORT_TYPE);
+
+    cspReportAction.withServletRequest(request);
+
+    assertEquals(
+        "Valid report request was not processed",
+        1,
+        cspReportAction.actualNumberOfReports
+    );
+
+    assertEquals(
+        "Processed report body did not match",
+        sampleReport,
+        cspReportAction.actualReport
+    );
+
+    assertCorrectResponseStatusCode(cspReportAction);
+  }
+
+  private void assertCorrectResponseStatusCode(TestCspReportAction cspReportAction) {
+    MockHttpServletResponse response = new MockHttpServletResponse();
+    cspReportAction.withServletResponse(response);
+
+    assertEquals(
+        "Unexpected response status code: " + response.getStatus(),
+        204,
+        response.getStatus()
+    );
+  }
+
+  static class TestCspReportAction extends CspReportAction {
+    int actualNumberOfReports;
+    String actualReport;
+
+    @Override
+    void processReport(String jsonCspReport) {
+      actualNumberOfReports++;
+      actualReport = jsonCspReport;
+    }
+  }
+}