diff --git a/integration-tests/nghttpx_http1_test.go b/integration-tests/nghttpx_http1_test.go
index 1fc8e25c..71aeeb85 100644
--- a/integration-tests/nghttpx_http1_test.go
+++ b/integration-tests/nghttpx_http1_test.go
@@ -164,7 +164,7 @@ func TestH1H1GracefulShutdown(t *testing.T) {
 
 // TestH1H1HostRewrite tests that server rewrites Host header field
 func TestH1H1HostRewrite(t *testing.T) {
-	st := newServerTester(nil, t, func(w http.ResponseWriter, r *http.Request) {
+	st := newServerTester([]string{"--host-rewrite"}, t, func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Add("request-host", r.Host)
 	})
 	defer st.Close()
@@ -212,7 +212,7 @@ func TestH1H1HTTP10(t *testing.T) {
 // field using actual backend server even if --no-http-rewrite is
 // used.
 func TestH1H1HTTP10NoHostRewrite(t *testing.T) {
-	st := newServerTester([]string{"--no-host-rewrite"}, t, func(w http.ResponseWriter, r *http.Request) {
+	st := newServerTester(nil, t, func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Add("request-host", r.Host)
 	})
 	defer st.Close()
@@ -429,7 +429,7 @@ func TestH1H2HTTP10(t *testing.T) {
 // field using actual backend server even if --no-http-rewrite is
 // used.
 func TestH1H2HTTP10NoHostRewrite(t *testing.T) {
-	st := newServerTester([]string{"--http2-bridge", "--no-host-rewrite"}, t, func(w http.ResponseWriter, r *http.Request) {
+	st := newServerTester([]string{"--http2-bridge"}, t, func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Add("request-host", r.Host)
 	})
 	defer st.Close()
diff --git a/integration-tests/nghttpx_http2_test.go b/integration-tests/nghttpx_http2_test.go
index 542e4c37..5fe4c3db 100644
--- a/integration-tests/nghttpx_http2_test.go
+++ b/integration-tests/nghttpx_http2_test.go
@@ -195,7 +195,7 @@ func TestH2H1NoVia(t *testing.T) {
 
 // TestH2H1HostRewrite tests that server rewrites host header field
 func TestH2H1HostRewrite(t *testing.T) {
-	st := newServerTester(nil, t, func(w http.ResponseWriter, r *http.Request) {
+	st := newServerTester([]string{"--host-rewrite"}, t, func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Add("request-host", r.Host)
 	})
 	defer st.Close()
@@ -217,7 +217,7 @@ func TestH2H1HostRewrite(t *testing.T) {
 // TestH2H1NoHostRewrite tests that server does not rewrite host
 // header field
 func TestH2H1NoHostRewrite(t *testing.T) {
-	st := newServerTester([]string{"--no-host-rewrite"}, t, func(w http.ResponseWriter, r *http.Request) {
+	st := newServerTester(nil, t, func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Add("request-host", r.Host)
 	})
 	defer st.Close()
@@ -813,7 +813,7 @@ func TestH2H2ConnectFailure(t *testing.T) {
 
 // TestH2H2HostRewrite tests that server rewrites host header field
 func TestH2H2HostRewrite(t *testing.T) {
-	st := newServerTester([]string{"--http2-bridge"}, t, func(w http.ResponseWriter, r *http.Request) {
+	st := newServerTester([]string{"--http2-bridge", "--host-rewrite"}, t, func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Add("request-host", r.Host)
 	})
 	defer st.Close()
@@ -835,7 +835,7 @@ func TestH2H2HostRewrite(t *testing.T) {
 // TestH2H2NoHostRewrite tests that server does not rewrite host
 // header field
 func TestH2H2NoHostRewrite(t *testing.T) {
-	st := newServerTester([]string{"--http2-bridge", "--no-host-rewrite"}, t, func(w http.ResponseWriter, r *http.Request) {
+	st := newServerTester([]string{"--http2-bridge"}, t, func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Add("request-host", r.Host)
 	})
 	defer st.Close()