diff --git a/lambda-test/Makefile b/lambda-test/Makefile
index 7f70182..1fc122f 100644
--- a/lambda-test/Makefile
+++ b/lambda-test/Makefile
@@ -15,8 +15,8 @@
 ## If you've split your program into multiple .c / .h files, 
 ## include the additional source (in same directory) here 
 LOCAL_SOURCE = avrjunit.c adc-test.c alert-test.c command-test.c \
-display-test.c integers-test.c interrupts-test.c rules-test.c sensors-test.c \
-strings-test.c usart-test.c
+display-test.c integers-test.c interrupts-test.c release-test.c \
+rules-test.c sensors-test.c strings-test.c usart-test.c
 
 ## Here you can link to one more directory (and multiple .c files)
 EXTRA_SOURCE_DIR = ../lambda/
diff --git a/lambda-test/lambda-test.c b/lambda-test/lambda-test.c
index e47a3e6..864e5c5 100644
--- a/lambda-test/lambda-test.c
+++ b/lambda-test/lambda-test.c
@@ -23,6 +23,7 @@
 int main(void) {
 	initUSART();
 
+	extern TestClass releaseClass;
 	extern TestClass adcClass;
 	extern TestClass alertClass;
 	extern TestClass commandClass;
@@ -35,6 +36,7 @@
 	extern TestClass usartClass;
 
 	beginSuite("lambda");
+	runClass(releaseClass);
 	runClass(adcClass);
 	runClass(alertClass);
 	runClass(commandClass);
diff --git a/lambda-test/release-test.c b/lambda-test/release-test.c
new file mode 100644
index 0000000..b93e8b4
--- /dev/null
+++ b/lambda-test/release-test.c
@@ -0,0 +1,54 @@
+/*
+ * release-test.c
+ *
+ * Unit tests for the lambda project.
+ *
+ *  Created on: 15.05.2015
+ *      Author: dode@luniks.net
+ *
+ */
+
+#include "avrjunit.h"
+#include "interrupts.h"
+#include "messages.h"
+#include "pins.h"
+#include "sensors.h"
+
+/* Validate release */
+
+/**
+ * TODO Makefile, improve this, how?
+ */
+static bool testRelease(void) {
+	// language set to en
+	assertTrue(0 == LANG);
+
+	// pins according to diagram
+	assertTrue(PD7 == LCD_RS);
+	assertTrue(PD6 == LCD_EN);
+	assertTrue(PD5 == LCD_DB4);
+	assertTrue(PD4 == LCD_DB5);
+	assertTrue(PD3 == LCD_DB6);
+	assertTrue(PD2 == LCD_DB7);
+
+	// average value
+	assertTrue(61 == INTS_PER_SEC);
+
+	// nominal value
+	assertTrue(100 == SHUNT_MILLIOHMS);
+
+	return true;
+}
+
+/* Test "class" */
+static const char class[] PROGMEM = "release";
+
+/* Test names */
+static const char testRelease_P[] PROGMEM = "testRelease";
+
+/* Tests */
+static TestCase const tests[] = {
+		{class, testRelease_P, testRelease}
+};
+
+TestClass releaseClass = {tests, sizeof(tests) / sizeof(tests[0])};