diff --git a/router_test.go b/router_test.go
index b70790d..aaae0ad 100644
--- a/router_test.go
+++ b/router_test.go
@@ -140,7 +140,147 @@ func TestNewRouterDuplicateModuleId(t *testing.T) {
 	_, moduleErrors, _ := showbridge.NewRouter(routerConfig, tracer)
 
 	if moduleErrors == nil {
-		t.Fatalf("router should have returned 'duplicate id' module error")
+		t.Fatalf("router should have returned module error")
+	}
+
+	if len(moduleErrors) != 1 {
+		t.Fatalf("router should have returned exactly 1 module error, got: %d", len(moduleErrors))
+	}
+
+	if moduleErrors[0].Error.Error() != "module id already exists" {
+		t.Fatalf("module error did not match expected, got: %s", moduleErrors[0].Error.Error())
+	}
+}
+
+func TestNewRouterRouteWithUnknwonProcessor(t *testing.T) {
+	routerConfig := config.Config{
+		Modules: []config.ModuleConfig{
+			{
+				Id:   "mock",
+				Type: "mock.counter",
+			},
+		},
+		Routes: []config.RouteConfig{
+			{
+				Input: "mock",
+				Processors: []config.ProcessorConfig{
+					{
+						Type: "asdfasdf",
+					},
+				},
+				Output: "mock",
+			},
+		},
+	}
+
+	_, _, routeErrors := showbridge.NewRouter(routerConfig, tracer)
+
+	if routeErrors == nil {
+		t.Fatalf("router should have returned a route error")
+	}
+
+	if len(routeErrors) != 1 {
+		t.Fatalf("router should have returned exactly 1 route error, got: %d", len(routeErrors))
+	}
+
+	if routeErrors[0].Error.Error() != "problem loading processor registration for processor type: asdfasdf" {
+		t.Fatalf("route error did not match expected, got: %s", routeErrors[0].Error.Error())
+	}
+}
+
+func TestRouterInputUnknownDestinationModule(t *testing.T) {
+	routerConfig := config.Config{
+		Modules: []config.ModuleConfig{
+			{
+				Id:   "mock",
+				Type: "mock.counter",
+			},
+		},
+		Routes: []config.RouteConfig{
+			{
+				Input:  "mock",
+				Output: "test",
+			},
+		},
+	}
+
+	router, moduleErrors, routeErrors := showbridge.NewRouter(routerConfig, tracer)
+
+	if moduleErrors != nil {
+		t.Fatalf("router should not have returned any module errors: %v", moduleErrors)
+	}
+
+	if routeErrors != nil {
+		t.Fatalf("router should not have returned any route errors: %v", routeErrors)
+	}
+
+	routerRunner := sync.WaitGroup{}
+
+	routerRunner.Go(func() {
+		router.Start(t.Context())
+		fmt.Println("router stopped")
+	})
+
+	time.Sleep(time.Second * 1)
+
+	defer router.Stop()
+
+	_, routingErrors := router.HandleInput(t.Context(), "mock", "test")
+
+	if routingErrors == nil {
+		t.Fatalf("router should encounter routing errors when trying to route to an unknown module")
+	}
+
+	if len(routingErrors) != 1 {
+		t.Fatalf("router should have returned exactly 1 routing error, got: %d", len(routingErrors))
+	}
+
+	if routingErrors[0].OutputError.Error() != "no module found for destination id" {
+		t.Fatalf("routing output error did not match expected, got: %s", routingErrors[0].OutputError.Error())
+	}
+}
+
+func TestRouterInputNoMatchingRoute(t *testing.T) {
+	routerConfig := config.Config{
+		Modules: []config.ModuleConfig{
+			{
+				Id:   "mock",
+				Type: "mock.counter",
+			},
+		},
+		Routes: []config.RouteConfig{
+			{
+				Input:  "test",
+				Output: "mock",
+			},
+		},
+	}
+
+	router, moduleErrors, routeErrors := showbridge.NewRouter(routerConfig, tracer)
+
+	if moduleErrors != nil {
+		t.Fatalf("router should not have returned any module errors: %v", moduleErrors)
+	}
+
+	if routeErrors != nil {
+		t.Fatalf("router should not have returned any route errors: %v", routeErrors)
+	}
+
+	routerRunner := sync.WaitGroup{}
+
+	routerRunner.Go(func() {
+		router.Start(t.Context())
+		fmt.Println("router stopped")
+	})
+
+	time.Sleep(time.Second * 1)
+
+	defer router.Stop()
+
+	aRouteFound, _ := router.HandleInput(t.Context(), "mock", "test")
+
+	if aRouteFound {
+		t.Fatalf("router should not have found a matching route for the input")
 	}
 }