diff --git a/src/main/java/de/neuland/pug4j/parser/node/AttrsNode.java b/src/main/java/de/neuland/pug4j/parser/node/AttrsNode.java
index 971db76..b1890d3 100644
--- a/src/main/java/de/neuland/pug4j/parser/node/AttrsNode.java
+++ b/src/main/java/de/neuland/pug4j/parser/node/AttrsNode.java
@@ -1,5 +1,6 @@
 package de.neuland.pug4j.parser.node;
 
+import java.time.Instant;
 import java.util.*;
 
 import com.google.gson.Gson;
@@ -272,9 +273,13 @@ else if (expressionValue != null && expressionValue.getClass().isArray()) {
                     if (template.isTerse()) {
                         value = null;
                     }
+                } else if (expressionValue instanceof Instant) {
+                    Instant instantValue = (Instant) expressionValue;
+                    value = instantValue.toString();
                 } else if (
-                        expressionValue.getClass().isArray()
-                                || expressionValue instanceof Map || expressionValue instanceof List
+                    expressionValue.getClass().isArray()
+                    || expressionValue instanceof Map
+                    || expressionValue instanceof List
                 ) {
                     value = StringEscapeUtils.unescapeJava(gson.toJson(expressionValue));
                 }else{
diff --git a/src/test/java/de/neuland/pug4j/integration/OriginalPug3Test.java b/src/test/java/de/neuland/pug4j/integration/OriginalPug3Test.java
index 8ab3b2b..052b1a6 100644
--- a/src/test/java/de/neuland/pug4j/integration/OriginalPug3Test.java
+++ b/src/test/java/de/neuland/pug4j/integration/OriginalPug3Test.java
@@ -23,13 +23,10 @@ public class OriginalPug3Test {
 
             // try to read files in ../
             //unsupported
-            "styles", // wrong indent, rest ok.
             "filters.include", //unsupported filters
             "filters.stylus", //missing filter
             "filters.less", // missing filter
             "filters.nested", // missing filter
-            "attrs-data", // only timeformat different
-            "attrs", // only timeformat different
             "filter-in-include", // missing less filter
             "pipeless-filters", //maybe missing markdown-it or different markdown syntax as in js markdown
             "code.iteration", // function block not working in buffered code. Maybe report to GraalVM Bugtracker.
diff --git a/src/test/resources/pugjs@3.0.2/cases/attrs-data.html b/src/test/resources/pugjs@3.0.2/cases/attrs-data.html
index 71116d3..c5a3abf 100644
--- a/src/test/resources/pugjs@3.0.2/cases/attrs-data.html
+++ b/src/test/resources/pugjs@3.0.2/cases/attrs-data.html
@@ -3,4 +3,4 @@
 <foo data-username="tobi"></foo>
 <foo data-escaped="{&quot;message&quot;:&quot;Let's rock!&quot;}"></foo>
 <foo data-ampersand="{&quot;message&quot;:&quot;a quote: &amp;quot; this &amp; that&quot;}"></foo>
-<foo data-epoc="1970-01-01T00:00:00.000Z"></foo>
+<foo data-epoc="1970-01-01T00:00:00.001Z"></foo>
diff --git a/src/test/resources/pugjs@3.0.2/cases/attrs-data.pug b/src/test/resources/pugjs@3.0.2/cases/attrs-data.pug
index 9e5b4b6..36ff864 100644
--- a/src/test/resources/pugjs@3.0.2/cases/attrs-data.pug
+++ b/src/test/resources/pugjs@3.0.2/cases/attrs-data.pug
@@ -4,4 +4,4 @@ foo(data-items=[1,2,3])
 foo(data-username='tobi')
 foo(data-escaped={message: "Let's rock!"})
 foo(data-ampersand={message: "a quote: &quot; this & that"})
-foo(data-epoc=new Date(0))
+foo(data-epoc=new Date(1))
diff --git a/src/test/resources/pugjs@3.0.2/cases/attrs.html b/src/test/resources/pugjs@3.0.2/cases/attrs.html
index 9dcaee5..f243769 100644
--- a/src/test/resources/pugjs@3.0.2/cases/attrs.html
+++ b/src/test/resources/pugjs@3.0.2/cases/attrs.html
@@ -10,7 +10,7 @@
 </select><a foo="class:"></a>
 <input pattern="\S+"/>
 <foo terse="true"></foo>
-<foo date="1970-01-01T00:00:00.000Z"></foo>
+<foo date="1970-01-01T00:00:00.001Z"></foo>
 <foo abc="abc" def="def"></foo>
 <foo abc="abc" def="def"></foo>
 <foo abc="abc" def="def"></foo>
diff --git a/src/test/resources/pugjs@3.0.2/cases/attrs.pug b/src/test/resources/pugjs@3.0.2/cases/attrs.pug
index d4420e3..3098fd1 100644
--- a/src/test/resources/pugjs@3.0.2/cases/attrs.pug
+++ b/src/test/resources/pugjs@3.0.2/cases/attrs.pug
@@ -20,7 +20,7 @@ select
 a(foo="class:")
 input(pattern='\\S+')
 foo(terse="true")
-foo(date=new Date(0))
+foo(date=new Date(1))
 
 foo(abc
    ,def)
diff --git a/src/test/resources/pugjs@3.0.2/cases/styles.html b/src/test/resources/pugjs@3.0.2/cases/styles.html
index 251556e..743b276 100644
--- a/src/test/resources/pugjs@3.0.2/cases/styles.html
+++ b/src/test/resources/pugjs@3.0.2/cases/styles.html
@@ -11,10 +11,10 @@
     <div style="color:red;background:green;"></div>
     <div style="color:red;background:green"></div>
     <div style="color:red;background:green;"></div>
-        <div style="color:red;background:green"></div>
-        <div style="color:red;background:green;"></div>
+    <div style="color:red;background:green"></div>
+    <div style="color:red;background:green;"></div>
+    <div style="color:red;background:green;"></div>
     <div style="color:red;background:green;"></div>
     <div style="color:red;background:green;"></div>
-        <div style="color:red;background:green;"></div>
   </body>
 </html>