diff --git a/src/main/java/org/dstadler/audio/fm4/FM4Stream.java b/src/main/java/org/dstadler/audio/fm4/FM4Stream.java
index e80cb95..607766b 100644
--- a/src/main/java/org/dstadler/audio/fm4/FM4Stream.java
+++ b/src/main/java/org/dstadler/audio/fm4/FM4Stream.java
@@ -2,6 +2,7 @@
 
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import org.apache.commons.lang3.time.DateFormatUtils;
 import org.apache.commons.lang3.time.FastDateFormat;
 import org.dstadler.commons.http.HttpClientWrapper;
 import org.dstadler.commons.logging.jdk.LoggerFactory;
@@ -69,7 +70,9 @@ public String getTime() {
     }
 
     public String getTimeForREST() throws ParseException {
-        return DATETIME_FORMAT.format(DATETIME_FORMAT.parse(time));
+        // return the date-part
+        return DateFormatUtils.ISO_8601_EXTENDED_DATE_FORMAT.format(
+                DATETIME_FORMAT.parse(time));
     }
 
     /**
@@ -91,6 +94,7 @@ public long getStart() {
     }
 
     public String getShortTime() {
+        // return time-string up to minutes
         return getTime().substring(0, 16).
                 replace("T", " ");
     }
@@ -150,39 +154,4 @@ public String toString() {
                 ", duration=" + duration +
                 '}';
     }
-
-    /*
-         {
-            "isOnDemand" : true,
-            "programKey" : "4GP",
-            "subtitle" : "<p>Die wöchentliche Radioshow von Gilles Peterson.<br/>FM4-News um 17 Uhr und 18 Uhr (englisch)</p>",
-            "id" : 15652,
-            "niceTime" : 1575820800000,
-            "endISO" : "2019-12-08T19:00:40+01:00",
-            "broadcastDay" : 20191208,
-            "scheduledStartOffset" : -3600000,
-            "niceTimeISO" : "2019-12-08T17:00:00+01:00",
-            "scheduledStart" : 1575820800000,
-            "niceTimeOffset" : -3600000,
-            "program" : "4GP",
-            "scheduledEnd" : 1575828000000,
-            "title" : "Worldwide Show",
-            "endOffset" : -3600000,
-            "scheduledStartISO" : "2019-12-08T17:00:00+01:00",
-            "scheduledEndISO" : "2019-12-08T19:00:00+01:00",
-            "href" : "https://audioapi.orf.at/fm4/api/json/4.0/broadcast/4GP/20191208",
-            "station" : "fm4",
-            "startOffset" : -3600000,
-            "start" : 1575820794000,
-            "scheduledEndOffset" : -3600000,
-            "ressort" : null,
-            "end" : 1575828040000,
-            "state" : "C",
-            "startISO" : "2019-12-08T16:59:54+01:00",
-            "isAdFree" : false,
-            "entity" : "Broadcast",
-            "isGeoProtected" : false
-         },
-
-     */
 }
diff --git a/src/test/java/org/dstadler/audio/fm4/FM4StreamTest.java b/src/test/java/org/dstadler/audio/fm4/FM4StreamTest.java
index d223dec..dcf18f1 100644
--- a/src/test/java/org/dstadler/audio/fm4/FM4StreamTest.java
+++ b/src/test/java/org/dstadler/audio/fm4/FM4StreamTest.java
@@ -14,6 +14,7 @@
 
 import static org.dstadler.audio.fm4.FM4Stream.DATETIME_FORMAT;
 import static org.dstadler.audio.fm4.FM4Stream.FM4_STREAM_URL_BASE;
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
@@ -41,11 +42,29 @@ public void testFM4Stream() throws IOException, ParseException {
         assertNotNull(fm4Stream.getTime());
         assertNotNull(DATETIME_FORMAT.parse(fm4Stream.getTime()));
         assertNotNull(fm4Stream.getTimeForREST());
+
+        assertTrue("Failed for " + fm4Stream.getTimeForREST(),
+                fm4Stream.getTimeForREST().matches("\\d{4}-\\d{2}-\\d{2}"));
+
+        String time = DateFormatUtils.ISO_8601_EXTENDED_DATE_FORMAT.format(
+                FM4Stream.DATETIME_FORMAT.parse(fm4Stream.getTime()));
+        assertEquals(time, fm4Stream.getTimeForREST());
+
         assertNotNull(fm4Stream.getProgramKey());
         assertNotNull(fm4Stream.getSubtitle());
+
         assertNotNull(fm4Stream.getShortSummary());
+        assertTrue(fm4Stream.getShortSummary().contains(fm4Stream.getProgramKey()));
+        assertTrue(fm4Stream.getShortSummary().contains(fm4Stream.getTitle()));
+
         assertNotNull(fm4Stream.getSummary());
+        assertTrue(fm4Stream.getSummary().contains(fm4Stream.getProgramKey()));
+        assertTrue(fm4Stream.getSummary().contains(fm4Stream.getShortTime()));
+        assertTrue(fm4Stream.getSummary().contains(fm4Stream.getTitle()));
+
         assertNotNull(fm4Stream.getShortTime());
+        assertTrue("Failed for " + fm4Stream.getShortTime(),
+                fm4Stream.getShortTime().matches("\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}"));
         assertNotNull(DateFormatUtils.ISO_8601_EXTENDED_DATE_FORMAT.parse(fm4Stream.getShortTime()));
         assertTrue("Duration should be set, but had: " + fm4Stream.getDuration(),
                 fm4Stream.getDuration() > 0);
@@ -57,6 +76,8 @@ public void testFM4Stream() throws IOException, ParseException {
                 fm4Stream.getStart() > MIN_START_TIME);
 
         assertNotNull(fm4Stream.toString());
+
+        TestHelpers.ToStringTest(fm4Stream);
     }
 
     @Test
@@ -101,5 +122,8 @@ public void testEquals() {
 
         assertNotNull(fm4.toString());
         assertNotNull(notEquals.toString());
+
+        TestHelpers.ToStringTest(fm4);
+        TestHelpers.ToStringTest(notEquals);
     }
 }