diff --git a/tests/UnitTests/TemplateSource/TagTests/Include/CompileIncludeTest.php b/tests/UnitTests/TemplateSource/TagTests/Include/CompileIncludeTest.php
index c07f11007..648920fe5 100644
--- a/tests/UnitTests/TemplateSource/TagTests/Include/CompileIncludeTest.php
+++ b/tests/UnitTests/TemplateSource/TagTests/Include/CompileIncludeTest.php
@@ -330,6 +330,6 @@ public function dataTestSpacing()
 	 */
 	public function testInlineStringInclude()
 	{
-		$this->assertEquals('include-inline', $this->smarty->fetch('inline_string_include.tpl'));
+		$this->assertEquals("include-inline\n", $this->smarty->fetch('inline_string_include.tpl'));
 	}
 }
diff --git a/tests/UnitTests/TemplateSource/TagTests/Include/templates/inline_string_include.tpl b/tests/UnitTests/TemplateSource/TagTests/Include/templates/inline_string_include.tpl
index 44d7eb3a6..efcd791af 100644
--- a/tests/UnitTests/TemplateSource/TagTests/Include/templates/inline_string_include.tpl
+++ b/tests/UnitTests/TemplateSource/TagTests/Include/templates/inline_string_include.tpl
@@ -1 +1 @@
-{include "string:include-inline" inline}
\ No newline at end of file
+{include "string:include-inline\n" inline}
\ No newline at end of file
diff --git a/tests/UnitTests/TemplateSource/_Issues/639/IncludeBlockToInlineIssue639Test.php b/tests/UnitTests/TemplateSource/_Issues/639/IncludeBlockToInlineIssue639Test.php
new file mode 100644
index 000000000..12d7830c8
--- /dev/null
+++ b/tests/UnitTests/TemplateSource/_Issues/639/IncludeBlockToInlineIssue639Test.php
@@ -0,0 +1,38 @@
+<?php
+/**
+ * Smarty PHPunit tests compiler errors
+ *
+ * @package PHPunit
+ * @author  Uwe Tews
+ */
+
+/**
+ * class for compiler tests
+ *
+ * @runTestsInSeparateProcess
+ * @preserveGlobalState disabled
+ * @backupStaticAttributes enabled
+ *
+ * Switching from block to inline include crashes render
+ */
+class IncludeBlockToInlineIssue639Test extends PHPUnit_Smarty
+{
+    public function setUp()
+    {
+        $this->setUpSmarty(dirname(__FILE__));
+    }
+
+    public function testInit()
+    {
+        $this->cleanDirs();
+    }
+
+    public function testInlineFirst()
+    {
+        $this->assertEquals("include-inline\ninclude-regular\n", $this->smarty->fetch('001_inline_first.tpl'));
+    }
+    public function testInlineLast()
+    {
+        $this->assertEquals("include-regular\ninclude-inline\n", $this->smarty->fetch('002_inline_last.tpl'));
+    }
+}
diff --git a/tests/UnitTests/TemplateSource/_Issues/639/cache/.gitignore b/tests/UnitTests/TemplateSource/_Issues/639/cache/.gitignore
new file mode 100644
index 000000000..d88cc1446
--- /dev/null
+++ b/tests/UnitTests/TemplateSource/_Issues/639/cache/.gitignore
@@ -0,0 +1,2 @@
+# Ignore anything in here, but keep this directory
+*
diff --git a/tests/UnitTests/TemplateSource/_Issues/639/templates/001_inline_first.tpl b/tests/UnitTests/TemplateSource/_Issues/639/templates/001_inline_first.tpl
new file mode 100644
index 000000000..ee8163eb1
--- /dev/null
+++ b/tests/UnitTests/TemplateSource/_Issues/639/templates/001_inline_first.tpl
@@ -0,0 +1,2 @@
+{include "string:include-inline\n" inline}
+{include "string:include-regular\n"}
diff --git a/tests/UnitTests/TemplateSource/_Issues/639/templates/002_inline_last.tpl b/tests/UnitTests/TemplateSource/_Issues/639/templates/002_inline_last.tpl
new file mode 100644
index 000000000..208ee0f19
--- /dev/null
+++ b/tests/UnitTests/TemplateSource/_Issues/639/templates/002_inline_last.tpl
@@ -0,0 +1,2 @@
+{include "string:include-regular\n"}
+{include "string:include-inline\n" inline}
diff --git a/tests/UnitTests/TemplateSource/_Issues/639/templates_c/.gitignore b/tests/UnitTests/TemplateSource/_Issues/639/templates_c/.gitignore
new file mode 100644
index 000000000..d88cc1446
--- /dev/null
+++ b/tests/UnitTests/TemplateSource/_Issues/639/templates_c/.gitignore
@@ -0,0 +1,2 @@
+# Ignore anything in here, but keep this directory
+*