diff -r 782b2f2d1e76 -r 2cb33775fc6f test/jdk/java/net/httpclient/HeadersTest1.java
--- a/test/jdk/java/net/httpclient/HeadersTest1.java	Tue Jan 16 15:52:01 2018 +0000
+++ b/test/jdk/java/net/httpclient/HeadersTest1.java	Wed Jan 17 12:19:06 2018 +0000
@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug 8153142
+ * @bug 8153142 8195138
  * @modules jdk.incubator.httpclient
  *          jdk.httpserver
  * @run testng/othervm HeadersTest1
@@ -113,8 +113,16 @@
             }
 
             // toString
-            hd.toString().toLowerCase().contains("content-length");
-            hd.toString().toLowerCase().contains("x-foo-response");
+            assertTrue(hd.toString().toLowerCase().contains("content-length"));
+            assertTrue(hd.toString().toLowerCase().contains("x-foo-response"));
+            assertTrue(hd.toString().toLowerCase().contains("x-multi-line-response"));
+
+            // multi-line
+            List<String> multiline = hd.allValues("x-multi-line-response");
+            assertTrue(multiline.get(0).startsWith("Custom "));
+            assertTrue(multiline.get(0).contains(" foo=\"bar\""));
+            assertTrue(multiline.get(0).contains(" bar=\"foo\""));
+            assertTrue(multiline.get(0).contains(" foobar=\"barfoo\""));
         } finally {
             server.stop(0);
             e.shutdownNow();
@@ -138,6 +146,9 @@
             Headers h = he.getResponseHeaders();
             h.add("X-Foo-Response", "resp1");
             h.add("X-Foo-Response", "resp2");
+            h.add("X-multi-line-response", "Custom foo=\"bar\","
+                    + "\r\n    bar=\"foo\","
+                    + "\r\n    foobar=\"barfoo\"");
             he.sendResponseHeaders(200, RESPONSE.length());
             OutputStream os = he.getResponseBody();
             os.write(RESPONSE.getBytes(US_ASCII));