diff --git a/unit_tests/test.mk b/unit_tests/test.mk
index 58e0cecc69..88a1520dac 100644
--- a/unit_tests/test.mk
+++ b/unit_tests/test.mk
@@ -9,6 +9,7 @@ TEST_SRC_CPP = test_util.cpp \
 	test_trigger_decoder.cpp \
 	test_fuel_map.cpp \
 	engine_test_helper.cpp \
+	test_logic_expression.cpp \
 	test_speed_density.cpp \
 	test_signal_executor.cpp \
 	test_sensors.cpp \
diff --git a/unit_tests/test_accel_enrichment.h b/unit_tests/test_accel_enrichment.h
index 225a846664..bfc339e2e9 100644
--- a/unit_tests/test_accel_enrichment.h
+++ b/unit_tests/test_accel_enrichment.h
@@ -6,12 +6,9 @@
  *      Author: Andrey Belomutskiy, (c) 2012-2013
  */
 
-
 #ifndef TEST_ACCEL_ENRICHMENT_H_
 #define TEST_ACCEL_ENRICHMENT_H_
 
 void testAccelEnrichment(void);
 
-
-
 #endif /* TEST_ACCEL_ENRICHMENT_H_ */
diff --git a/unit_tests/test_logic_expression.cpp b/unit_tests/test_logic_expression.cpp
new file mode 100644
index 0000000000..6a97e002eb
--- /dev/null
+++ b/unit_tests/test_logic_expression.cpp
@@ -0,0 +1,23 @@
+/**
+ * @file test_logic_expression.cpp
+ *
+ * https://sourceforge.net/p/rusefi/tickets/102/
+ *
+ * @date Oct 3, 2014
+ * @author Andrey Belomutskiy, (c) 2012-2014
+ */
+
+#include "main.h"
+#include "test_logic_expression.h"
+
+void testLogicExpressions(void) {
+	/**
+	 * fuel_pump = (time_since_boot < 4 seconds) OR (rpm > 0)
+	 * fuel_pump = time_since_boot 4 less rpm 0 more OR
+	 */
+
+	/**
+	 * fan = (not fan && coolant > 90) OR (fan && coolant > 85)
+	 * fan = fan NOT coolant 90 AND more fan coolant 85 more AND OR
+	 */
+}
diff --git a/unit_tests/test_logic_expression.h b/unit_tests/test_logic_expression.h
new file mode 100644
index 0000000000..5bea826570
--- /dev/null
+++ b/unit_tests/test_logic_expression.h
@@ -0,0 +1,13 @@
+/**
+ * @file test_logic_expression.h
+ *
+ * @date Oct 3, 2014
+ * @author Andrey Belomutskiy, (c) 2012-2014
+ */
+
+#ifndef TEST_LOGIC_EXPRESSION_H_
+#define TEST_LOGIC_EXPRESSION_H_
+
+void testLogicExpressions(void);
+
+#endif /* TEST_LOGIC_EXPRESSION_H_ */