diff --git a/addons/gut/test.gd b/addons/gut/test.gd
index fd41caa7..6445e25f 100644
--- a/addons/gut/test.gd
+++ b/addons/gut/test.gd
@@ -201,6 +201,16 @@ func _do_datatypes_match__fail_if_not(got, expected, text):
 	return did_pass
 
 
+# Checks if the input is not null. If it is, a fail occurs. Otherwise, TRUE is
+# returned.
+func _fail_if_null(got, input_name, text):
+	if(got == null):
+		_fail(str(input_name, ' cannot be NULL.'))
+		return false
+	
+	return true
+
+
 # Create a string that lists all the methods that were called on an spied
 # instance.
 func _get_desc_of_calls_to_instance(inst):
@@ -928,7 +938,10 @@ func assert_ne(got, not_expected, text=""):
 ## [/codeblock]
 func assert_almost_eq(got, expected, error_interval, text=''):
 	var disp = "[" + _str_precision(got, 20) + "] expected to equal [" + _str(expected) + "] +/- [" + str(error_interval) + "]:  " + text
-	if(_do_datatypes_match__fail_if_not(got, expected, text) and _do_datatypes_match__fail_if_not(got, error_interval, text)):
+	if(
+		_fail_if_null(got, '[Got]', text) and _fail_if_null(expected, '[Expected]', text) and _fail_if_null(error_interval, '[Error Interval]', text) and
+		_do_datatypes_match__fail_if_not(got, expected, text) and _do_datatypes_match__fail_if_not(got, error_interval, text)
+	):
 		if not _is_almost_eq(got, expected, error_interval):
 			_fail(disp)
 		else:
@@ -939,7 +952,10 @@ func assert_almost_eq(got, expected, error_interval, text=''):
 ## outside the range of [param not_expected] +/- [param error_interval].
 func assert_almost_ne(got, not_expected, error_interval, text=''):
 	var disp = "[" + _str_precision(got, 20) + "] expected to not equal [" + _str(not_expected) + "] +/- [" + str(error_interval) + "]:  " + text
-	if(_do_datatypes_match__fail_if_not(got, not_expected, text) and _do_datatypes_match__fail_if_not(got, error_interval, text)):
+	if(
+		_fail_if_null(got, '[Got]', text) and _fail_if_null(not_expected, '[Not Expected]', text) and _fail_if_null(error_interval, '[Error Interval]', text) and
+		_do_datatypes_match__fail_if_not(got, not_expected, text) and _do_datatypes_match__fail_if_not(got, error_interval, text)
+	):
 		if _is_almost_eq(got, not_expected, error_interval):
 			_fail(disp)
 		else:
@@ -961,7 +977,7 @@ func _is_almost_eq(got, expected, error_interval) -> bool:
 
 	return(result)
 
-## assserts got > expected
+## asserts got > expected
 ## [codeblock]
 ##    var bigger = 5
 ##    var smaller = 0
diff --git a/test/unit/test_test.gd b/test/unit/test_test.gd
index 1da67e2d..02516877 100644
--- a/test/unit/test_test.gd
+++ b/test/unit/test_test.gd
@@ -342,6 +342,32 @@ class TestAssertAlmostEq:
 		assert_fail_msg_contains(gr.test, '03450')
 		assert_fail_msg_contains(gr.test, '03210')
 
+	var datatype_data = [
+		[Vector3(1, 2, 3), 2.0, 3.0],
+		[1.0, Vector3(1, 2, 3), 3.0],
+		[1, 2, Vector3(1, 2, 3)],
+		[Vector3(1, 2, 3), Vector3(1, 2, 3), Vector2(1, 2)],
+	]
+	func test_datatype_checks(params = use_parameters(datatype_data)):
+		gr.test.assert_almost_eq(params[0], params[1], params[2])
+		assert_engine_error_count(0)
+		assert_fail(gr.test)
+		assert_fail_msg_contains(gr.test, "Cannot compare")
+
+	var null_data = [
+		[1, 2, null],
+		[1, null, 3],
+		[null, 2, 3],
+		[1, null, null],
+		[null, 2, null],
+		[null, null, 3],
+		[null, null, null],
+	]
+	func test_null_checks(params = use_parameters(null_data)):
+		gr.test.assert_almost_eq(params[0], params[1], params[2])
+		assert_engine_error_count(0)
+		assert_fail(gr.test)
+		assert_fail_msg_contains(gr.test, "cannot be NULL")
 
 # ------------------------------------------------------------------------------
 class TestAssertAlmostNe:
@@ -416,6 +442,33 @@ class TestAssertAlmostNe:
 		assert_fail(gr.test)
 		assert_fail_msg_contains(gr.test, '01230')
 
+	var datatype_data = [
+		[Vector3(1, 2, 3), 2.0, 3.0],
+		[1.0, Vector3(1, 2, 3), 3.0],
+		[1, 2, Vector3(1, 2, 3)],
+		[Vector3(1, 2, 3), Vector3(1, 2, 3), Vector2(1, 2)],
+	]
+	func test_datatype_checks(params = use_parameters(datatype_data)):
+		gr.test.assert_almost_ne(params[0], params[1], params[2])
+		assert_engine_error_count(0)
+		assert_fail(gr.test)
+		assert_fail_msg_contains(gr.test, "Cannot compare")
+
+	var null_data = [
+		[1, 2, null],
+		[1, null, 3],
+		[null, 2, 3],
+		[1, null, null],
+		[null, 2, null],
+		[null, null, 3],
+		[null, null, null],
+	]
+	func test_null_checks(params = use_parameters(null_data)):
+		gr.test.assert_almost_ne(params[0], params[1], params[2])
+		assert_engine_error_count(0)
+		assert_fail(gr.test)
+		assert_fail_msg_contains(gr.test, "cannot be NULL")
+
 # ------------------------------------------------------------------------------
 class TestAssertGt:
 	extends BaseTestClass