diff --git a/src/network/access/qhttpheaders.cpp b/src/network/access/qhttpheaders.cpp
index 24489e8b1b..47ddea8c69 100644
--- a/src/network/access/qhttpheaders.cpp
+++ b/src/network/access/qhttpheaders.cpp
@@ -51,15 +51,15 @@ Q_LOGGING_CATEGORY(lcQHttpHeaders, "qt.network.http.headers");
 
     \section1 Combining values
 
-    Most HTTP header values can be combined with a single comma \c {','},
-    and the semantic meaning is preserved. As an example, these two should be
-    semantically similar:
+    Most HTTP header values can be combined with a single comma \c {','}
+    plus an optional whitespace, and the semantic meaning is preserved.
+    As an example, these two should be semantically similar:
     \badcode
         // Values as separate header entries
         myheadername: myheadervalue1
         myheadername: myheadervalue2
         // Combined value
-        myheadername: myheadervalue1,myheadervalue2
+        myheadername: myheadervalue1, myheadervalue2
     \endcode
 
     However there is a notable exception to this rule:
@@ -1023,7 +1023,7 @@ QByteArray QHttpHeaders::combinedValue(QAnyStringView name) const
     for (const auto &v : valueList) {
         result.append(separator);
         result.append(v);
-        separator = ",";
+        separator = ", ";
     }
     return result;
 }
diff --git a/tests/auto/network/access/qhttpheaders/tst_qhttpheaders.cpp b/tests/auto/network/access/qhttpheaders/tst_qhttpheaders.cpp
index c69e941404..4401a5c495 100644
--- a/tests/auto/network/access/qhttpheaders/tst_qhttpheaders.cpp
+++ b/tests/auto/network/access/qhttpheaders/tst_qhttpheaders.cpp
@@ -81,7 +81,7 @@ void tst_QHttpHeaders::constructors()
     QHttpHeaders hmap = QHttpHeaders::fromMultiMap(map);
     QHttpHeaders hhash = QHttpHeaders::fromMultiHash(hash);
     CONTAINS_HEADER(nb1, v1);
-    CONTAINS_HEADER(nb2, nv2 + "," + nv2)
+    CONTAINS_HEADER(nb2, nv2 + ", " + nv2)
 #undef CONTAINS_HEADER
 }
 
@@ -129,7 +129,7 @@ void tst_QHttpHeaders::accessors()
         QCOMPARE(values.front(), expected.front());                 \
         /* ignore in-between */                                     \
         QCOMPARE(values.back(), expected.back());                   \
-        QCOMPARE(H.combinedValue(N), values.join(','));             \
+        QCOMPARE(H.combinedValue(N), values.join(", "));            \
     } while (false)
 
 #define EXISTS_ONCE(H, N, V) EXISTS_N_TIMES(1, H, N, V)
@@ -428,7 +428,7 @@ void tst_QHttpHeaders::headerValueField()
     h1.append(n1, " foo ");
     QCOMPARE(h1.combinedValue(n1), "foo");
     h1.append(n1, "\tbar\t");
-    QCOMPARE(h1.combinedValue(n1), "foo,bar");
+    QCOMPARE(h1.combinedValue(n1), "foo, bar");
     QCOMPARE(h1.size(), 2);
 
     h1.clear();
diff --git a/tests/auto/network/access/qnetworkrequestfactory/tst_qnetworkrequestfactory.cpp b/tests/auto/network/access/qnetworkrequestfactory/tst_qnetworkrequestfactory.cpp
index 06e751808e..fee137309e 100644
--- a/tests/auto/network/access/qnetworkrequestfactory/tst_qnetworkrequestfactory.cpp
+++ b/tests/auto/network/access/qnetworkrequestfactory/tst_qnetworkrequestfactory.cpp
@@ -237,10 +237,10 @@ void tst_QNetworkRequestFactory::headers()
     h1.append(name1, value3);
     factory.setCommonHeaders(h1);
     QVERIFY(factory.commonHeaders().contains(name1));
-    QCOMPARE(factory.commonHeaders().combinedValue(name1), value1 + ',' + value2 + ',' + value3);
+    QCOMPARE(factory.commonHeaders().combinedValue(name1), value1 + ", " + value2 + ", " + value3);
     request = factory.createRequest();
     QVERIFY(request.hasRawHeader(name1));
-    QCOMPARE(request.rawHeader(name1), value1 + ',' + value2 + ',' + value3);
+    QCOMPARE(request.rawHeader(name1), value1 + ", " + value2 + ", " + value3);
 }
 
 void tst_QNetworkRequestFactory::bearerToken()