diff --git a/tests/ADC/test_ADC.cpp b/tests/ADC/test_ADC.cpp
index c077306..b9abb6a 100644
--- a/tests/ADC/test_ADC.cpp
+++ b/tests/ADC/test_ADC.cpp
@@ -37,28 +37,52 @@ TEST(test_ADC, FirstTest)
    CHECK(true);
 }
 
-static void ADCStoresPortState(void){
-    mock().expectOneCall("RegEdit_ReadReg")
-        .withPointerParameter("reg", (void *) &PORTA.OUT)
-        .andReturnValue(0xFF);
 
-    mock().expectOneCall("RegEdit_ReadReg")
-        .withPointerParameter("reg", (void *) &PORTA.DIR)
-        .andReturnValue(0xFF);
+TEST(test_ADC, ADC_SetupSetsRegisters)
+{
+    //Clears control register A for ADC0
+    mock().expectOneCall("RegEdit_SetNum")
+        .withPointerParameter("reg", (void *) &ADC0.CTRLA)
+        .withUnsignedIntParameter("num", 0x00);
+
+    //Sets The sample accumulation number to 32.
+    mock().expectOneCall("RegEdit_SetNum")
+        .withPointerParameter("reg", (void *) &ADC0.CTRLB)
+        .withUnsignedIntParameter("num", 0x5);
+
+    //Sets the voltage reference to VDD or VCC.
+    mock().expectOneCall("RegEdit_SetBit")
+        .withPointerParameter("reg", (void *) &ADC0.CTRLC)
+        .withUnsignedIntParameter("bit_num", 4);
+
+    //Sets the pre-scalar for the adc sample rate.
+    mock().expectOneCall("RegEdit_SetBit")
+        .withPointerParameter("reg", (void *) &ADC0.CTRLC)
+        .withUnsignedIntParameter("bit_num", 2);
+
+    //Setup an Initalization delay.
+    mock().expectOneCall("RegEdit_OR_Num")
+        .withPointerParameter("reg", (void *) &ADC0.CTRLD)
+        .withUnsignedIntParameter("num", (2<<5));
+
+    //Set the bit for ADC variation during readings.
+    mock().expectOneCall("RegEdit_SetBit")
+        .withPointerParameter("reg", (void *) &ADC0.CTRLD)
+        .withUnsignedIntParameter("bit_num", 4);
+
+    ADC_Setup();     
 }
 
 TEST(test_ADC, ADC_InitPortAPin7UsesCorrectRegisters)
 {
-    ADCStoresPortState();
-
     //Check for setting the direction to input.
-    mock().expectOneCall("RegEdit_SetBit")
-        .withPointerParameter("reg", (void *) &PORTA.DIRCLR)
+    mock().expectOneCall("RegEdit_ClearBit")
+        .withPointerParameter("reg", (void *) &PORTA.DIR)
         .withUnsignedIntParameter("bit_num", 7);
  
     //Check that the pullup is off 
-    mock().expectOneCall("RegEdit_SetBit")
-        .withPointerParameter("reg", (void *) &PORTA.OUTCLR)
+    mock().expectOneCall("RegEdit_ClearBit")
+        .withPointerParameter("reg", (void *) &PORTA.OUT)
         .withUnsignedIntParameter("bit_num", 7);
 
     //Set the ISC(input sense config) to disable digital input
@@ -74,16 +98,14 @@ TEST(test_ADC, ADC_InitPortAPin7UsesCorrectRegisters)
 TEST(test_ADC, ADC_InitPortAPin0UsesCorrectRegisters)
 {
 
-    ADCStoresPortState();
-
     //Check for setting the direction to input.
-    mock().expectOneCall("RegEdit_SetBit")
-        .withPointerParameter("reg", (void *) &PORTA.DIRCLR)
+    mock().expectOneCall("RegEdit_ClearBit")
+        .withPointerParameter("reg", (void *) &PORTA.DIR)
         .withUnsignedIntParameter("bit_num", 0);
  
     //Check that the pullup is off 
-    mock().expectOneCall("RegEdit_SetBit")
-        .withPointerParameter("reg", (void *) &PORTA.OUTCLR)
+    mock().expectOneCall("RegEdit_ClearBit")
+        .withPointerParameter("reg", (void *) &PORTA.OUT)
         .withUnsignedIntParameter("bit_num", 0);
 
     //Set the ISC(input sense config) to disable digital input
@@ -92,6 +114,7 @@ TEST(test_ADC, ADC_InitPortAPin0UsesCorrectRegisters)
         .withPointerParameter("reg", (void *) &PORTA.PIN0CTRL)
         .withUnsignedIntParameter("bit_num", PORT_ISC_INPUT_DISABLE_gc);
 
+
     ADC_Init(0);
 }
 
@@ -101,51 +124,45 @@ TEST(test_ADC, ADC_InitDoesNothingOnHighPinNumbers)
     ADC_Init(8);
 }
 
-TEST(test_ADC, ADC_EnableSuccessOnPin7)
+TEST(test_ADC, ADC_EnablePasses)
 {
 
-    //Set the MUXPOS or the ADC pin stuff.
-    mock().expectOneCall("RegEdit_OR_Num")
-        .withPointerParameter("reg", (void *) &ADC0.MUXPOS)
-        .withUnsignedIntParameter("num", ADC_MUXPOS_AIN7_gc);
-
     mock().expectOneCall("RegEdit_SetBit")
         .withPointerParameter("reg", (void *) &ADC0.CTRLA)
         .withUnsignedIntParameter("bit_num", 0);
 
-    ADC_Enable(7);
+    ADC_Enable();
 
 }
 
-
-TEST(test_ADC, ADC_EnableNothingOnHighPinNumbers)
-{
-
-    mock().expectNoCall("RegEdit_SetBit");
-    ADC_Enable(8);
-}
-
 TEST(test_ADC, ADC_DisablePasses)
 {
-    //Clears the muxpos register     
-    mock().expectOneCall("RegEdit_ClearRegister")
-        .withPointerParameter("reg", (void *) &ADC0.MUXPOS);
-    
     mock().expectOneCall("RegEdit_ClearBit")
         .withPointerParameter("reg", (void *) &ADC0.CTRLA)
         .withUnsignedIntParameter("bit_num", 0);
-   
-    mock().expectOneCall("RegEdit_SetNum")
-        .withPointerParameter("reg", (void*) &PORTA.OUT)
-        .ignoreOtherParameters(); 
-
-    mock().expectOneCall("RegEdit_SetNum")
-        .withPointerParameter("reg", (void*) &PORTA.DIR)
-        .ignoreOtherParameters(); 
 
     ADC_Disable();
 }
 
+TEST(test_ADC, ADC_SetPinSetsRightRegisters)
+{
+    //It clears existing MUXPOS register values.
+    mock().expectOneCall("RegEdit_ClearRegister")
+        .withPointerParameter("reg", (void *) &ADC0.MUXPOS);
+
+    //It Correctly sets the pin number.
+    mock().expectOneCall("RegEdit_SetNum")
+        .withPointerParameter("reg", (void *) &ADC0.MUXPOS)
+        .withUnsignedIntParameter("num", 4);
+
+    ADC_SetPin(4);
+}
+
+
+TEST(test_ADC, ADC_SetPinFailsOnInvalidPin)
+{
+    ADC_SetPin(8);
+}
 
 
 static uint16_t ADC_ReadValueFake(uint8_t pin_num)
diff --git a/tests/MockADC/test_MockADC.cpp b/tests/MockADC/test_MockADC.cpp
index 45380c2..8b0b5ee 100644
--- a/tests/MockADC/test_MockADC.cpp
+++ b/tests/MockADC/test_MockADC.cpp
@@ -30,17 +30,16 @@ TEST_GROUP(test_MockADC)
 TEST(test_MockADC, ADC_InitExpects)
 {
     mock().expectOneCall("ADC_Init")
-       .withUnsignedIntParameter("pin_num", 0x2); 
+        .withUnsignedIntParameter("pin_num", 7);
 
-    ADC_Init(0x2);
+    ADC_Init(7);
 }
 
 TEST(test_MockADC, ADC_EnableExpects)
 {
-    mock().expectOneCall("ADC_Enable")
-       .withUnsignedIntParameter("pin_num", 0x2); 
+    mock().expectOneCall("ADC_Enable");
 
-    ADC_Enable(0x2);
+    ADC_Enable();
 }
 
 
@@ -84,3 +83,12 @@ TEST(test_MockADC, MockADC_PushValueDoesntOverflowArray)
         CHECK_TRUE(MockADC_GetIndex() <= 255);
     }
 }
+
+TEST(test_MockADC, MockADC_SetupSetsGlobal)
+{
+    CHECK_FALSE(MockADC_IsSetup());
+    
+    ADC_Setup();
+
+    CHECK_TRUE(MockADC_IsSetup());
+}
diff --git a/tests/zero_cross_detection/test_zero_cross_detection.cpp b/tests/zero_cross_detection/test_zero_cross_detection.cpp
index 5bb17ab..2b7d6e5 100644
--- a/tests/zero_cross_detection/test_zero_cross_detection.cpp
+++ b/tests/zero_cross_detection/test_zero_cross_detection.cpp
@@ -38,8 +38,7 @@ static void ZCDSetupExpectations(void)
     mock().expectOneCall("ADC_Init")
         .withUnsignedIntParameter("pin_num", 7);
 
-    mock().expectOneCall("ADC_Enable")
-        .withUnsignedIntParameter("pin_num", 7);
+    mock().expectOneCall("ADC_Enable");
 }