diff --git a/src/main/java/liqp/Template.java b/src/main/java/liqp/Template.java
index bdbd6f23..c6f979b7 100644
--- a/src/main/java/liqp/Template.java
+++ b/src/main/java/liqp/Template.java
@@ -154,7 +154,7 @@ private ParseTree parse(LiquidLexer lexer) {
         lexer.addErrorListener(new BaseErrorListener(){
             @Override
             public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol, int line, int charPositionInLine, String msg, RecognitionException e) {
-                throw new LiquidException(String.format("lexer error on line %s, index %s", line, charPositionInLine), line, charPositionInLine);
+                throw new LiquidException(String.format("lexer error \"%s\" on line %s, index %s", msg, line, charPositionInLine), line, charPositionInLine, e);
             }
         });
 
@@ -166,7 +166,7 @@ public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol, int
         parser.addErrorListener(new BaseErrorListener(){
             @Override
             public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol, int line, int charPositionInLine, String msg, RecognitionException e) {
-                throw new LiquidException(String.format("parser error on line %s, index %s", line, charPositionInLine), line, charPositionInLine);
+                throw new LiquidException(String.format("parser error \"%s\" on line %s, index %s", msg, line, charPositionInLine), line, charPositionInLine, e);
             }
         });
 
@@ -403,7 +403,11 @@ public String renderUnguarded(final Map<String, Object> variables) {
             return rendered == null ? "" : String.valueOf(rendered);
         }
         catch (Exception e) {
-            throw new RuntimeException(e);
+            if (e instanceof RuntimeException) {
+                throw e;
+            } else {
+                throw new RuntimeException(e);
+            }
         }
     }
 
diff --git a/src/main/java/liqp/exceptions/LiquidException.java b/src/main/java/liqp/exceptions/LiquidException.java
index a9487b26..b9a0e8aa 100644
--- a/src/main/java/liqp/exceptions/LiquidException.java
+++ b/src/main/java/liqp/exceptions/LiquidException.java
@@ -27,8 +27,8 @@ public LiquidException(String message, ParserRuleContext ctx) {
     this.charPositionInLine = ctx.start.getCharPositionInLine();
   }
 
-  public LiquidException(String message, int line, int charPositionInLine) {
-    super(message);
+  public LiquidException(String message, int line, int charPositionInLine, Throwable cause) {
+    super(message, cause);
     this.line = line;
     this.charPositionInLine = charPositionInLine;
   }
diff --git a/src/test/java/liqp/tags/IncludeTest.java b/src/test/java/liqp/tags/IncludeTest.java
index 7a028db4..d5eac32d 100644
--- a/src/test/java/liqp/tags/IncludeTest.java
+++ b/src/test/java/liqp/tags/IncludeTest.java
@@ -134,7 +134,7 @@ public void renderTestWithIncludeSubdirectorySpecifiedInLiquidFlavorWithStrictVa
     @Test
     public void renderTestWithIncludeSubdirectorySpecifiedInLiquidFlavorWithStrictVariablesException() throws Exception {
 
-        thrown.expectCause(new NestedCauseMatcher<>(isA(VariableNotExistException.class)));
+        thrown.expectCause(isA(VariableNotExistException.class));
 
         File index = new File("src/test/jekyll/index_with_variables.html");
         Template template = Template.parse(