diff --git a/test/warmup/IndexOfMaxTests.scala b/test/warmup/IndexOfMaxTests.scala
index 379686d..7f676a7 100644
--- a/test/warmup/IndexOfMaxTests.scala
+++ b/test/warmup/IndexOfMaxTests.scala
@@ -62,4 +62,18 @@ class IndexOfMaxTests extends TestBase {
 
         assert(actual == expected)
     }
+    
+    test("max8") {
+        val actual = Exercises.indexOfMax(Array(1, 2, 3, 0, 0, 6))
+        val expected = 5
+        
+        assert(actual == expected)
+    }
+
+    test("max9") {
+        val actual = Exercises.indexOfMax(Array(Int.MinValue))
+        val expected = 0
+        
+        assert(actual == expected)
+    }
 }
diff --git a/test/warmup/SpeedOffendersTests.scala b/test/warmup/SpeedOffendersTests.scala
index e1d8796..7f29e85 100644
--- a/test/warmup/SpeedOffendersTests.scala
+++ b/test/warmup/SpeedOffendersTests.scala
@@ -58,4 +58,13 @@ class SpeedOffendersTests extends TestBase {
     val expected = List(SpeedOffender("NX-66-PP",180), SpeedOffender("MM-11-OW",150), SpeedOffender("BA-12-PW",108))
     assert(speedOffenders(input).toList  == expected)
   }
+
+  test("speedOffender5") {
+    val input = List(
+      Observation("A", "OO-66-XX", Time(0, 18, 59, 59)),
+      Observation("B", "OO-66-XX", Time(0, 19, 0, 0))
+    )
+    val expected = List(SpeedOffender("OO-66-XX", 5400))
+    assert(speedOffenders(input).toList == expected)
+  }
 }
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