diff --git a/src/caduceus/caduceus_test.go b/src/caduceus/caduceus_test.go
index 32c3f87e..9216eb69 100644
--- a/src/caduceus/caduceus_test.go
+++ b/src/caduceus/caduceus_test.go
@@ -138,6 +138,7 @@ func TestServerHandler(t *testing.T) {
 	}
 
 	req := httptest.NewRequest("POST", "localhost:8080", strings.NewReader("Test payload."))
+	badReq := httptest.NewRequest("GET", "localhost:8080", strings.NewReader("Test payload."))
 
 	t.Run("TestServeHTTPHappyPath", func(t *testing.T) {
 		req.Header.Set("Content-Type", "application/json")
@@ -151,6 +152,18 @@ func TestServerHandler(t *testing.T) {
 		fakeHealth.AssertExpectations(t)
 	})
 
+	t.Run("TestServeHTTPBadMethod", func(t *testing.T) {
+		badReq.Header.Set("Content-Type", "application/json")
+
+		w := httptest.NewRecorder()
+		serverWrapper.ServeHTTP(w, badReq)
+		resp := w.Result()
+
+		assert.Equal(400, resp.StatusCode)
+		fakeHandler.AssertExpectations(t)
+		fakeHealth.AssertExpectations(t)
+	})
+
 	t.Run("TestServeHTTPTooManyHeaders", func(t *testing.T) {
 		req.Header.Add("Content-Type", "too/many/headers")