diff --git a/command/hook_count.go b/command/hook_count.go
index 12fb229abfc1..5f3f514c2cf6 100644
--- a/command/hook_count.go
+++ b/command/hook_count.go
@@ -97,7 +97,7 @@ func (h *CountHook) PostDiff(
 		h.ToAdd += 1
 	case terraform.DiffDestroy:
 		h.ToRemove += 1
-	default:
+	case terraform.DiffUpdate:
 		h.ToChange += 1
 	}
 
diff --git a/command/hook_count_test.go b/command/hook_count_test.go
index 37fc72b69c88..deb822699774 100644
--- a/command/hook_count_test.go
+++ b/command/hook_count_test.go
@@ -1,6 +1,7 @@
 package command
 
 import (
+	"reflect"
 	"testing"
 
 	"github.com/hashicorp/terraform/terraform"
@@ -9,3 +10,175 @@ import (
 func TestCountHook_impl(t *testing.T) {
 	var _ terraform.Hook = new(CountHook)
 }
+
+func TestCountHookPostDiff_DestroyOnly(t *testing.T) {
+	h := new(CountHook)
+
+	resources := map[string]*terraform.InstanceDiff{
+		"foo":   &terraform.InstanceDiff{Destroy: true},
+		"bar":   &terraform.InstanceDiff{Destroy: true},
+		"lorem": &terraform.InstanceDiff{Destroy: true},
+		"ipsum": &terraform.InstanceDiff{Destroy: true},
+	}
+
+	n := &terraform.InstanceInfo{} // TODO
+
+	for _, d := range resources {
+		h.PostDiff(n, d)
+	}
+
+	expected := new(CountHook)
+	expected.ToAdd = 0
+	expected.ToChange = 0
+	expected.ToRemoveAndAdd = 0
+	expected.ToRemove = 4
+
+	if !reflect.DeepEqual(expected, h) {
+		t.Fatalf("Expected %#v, got %#v instead.",
+			expected, h)
+	}
+}
+
+func TestCountHookPostDiff_AddOnly(t *testing.T) {
+	h := new(CountHook)
+
+	resources := map[string]*terraform.InstanceDiff{
+		"foo": &terraform.InstanceDiff{
+			Attributes: map[string]*terraform.ResourceAttrDiff{
+				"foo": &terraform.ResourceAttrDiff{RequiresNew: true},
+			},
+		},
+		"bar": &terraform.InstanceDiff{
+			Attributes: map[string]*terraform.ResourceAttrDiff{
+				"foo": &terraform.ResourceAttrDiff{RequiresNew: true},
+			},
+		},
+		"lorem": &terraform.InstanceDiff{
+			Attributes: map[string]*terraform.ResourceAttrDiff{
+				"foo": &terraform.ResourceAttrDiff{RequiresNew: true},
+			},
+		},
+	}
+
+	n := &terraform.InstanceInfo{}
+
+	for _, d := range resources {
+		h.PostDiff(n, d)
+	}
+
+	expected := new(CountHook)
+	expected.ToAdd = 3
+	expected.ToChange = 0
+	expected.ToRemoveAndAdd = 0
+	expected.ToRemove = 0
+
+	if !reflect.DeepEqual(expected, h) {
+		t.Fatalf("Expected %#v, got %#v instead.",
+			expected, h)
+	}
+}
+
+func TestCountHookPostDiff_ChangeOnly(t *testing.T) {
+	h := new(CountHook)
+
+	resources := map[string]*terraform.InstanceDiff{
+		"foo": &terraform.InstanceDiff{
+			Destroy: false,
+			Attributes: map[string]*terraform.ResourceAttrDiff{
+				"foo": &terraform.ResourceAttrDiff{},
+			},
+		},
+		"bar": &terraform.InstanceDiff{
+			Destroy: false,
+			Attributes: map[string]*terraform.ResourceAttrDiff{
+				"foo": &terraform.ResourceAttrDiff{},
+			},
+		},
+		"lorem": &terraform.InstanceDiff{
+			Destroy: false,
+			Attributes: map[string]*terraform.ResourceAttrDiff{
+				"foo": &terraform.ResourceAttrDiff{},
+			},
+		},
+	}
+
+	n := &terraform.InstanceInfo{}
+
+	for _, d := range resources {
+		h.PostDiff(n, d)
+	}
+
+	expected := new(CountHook)
+	expected.ToAdd = 0
+	expected.ToChange = 3
+	expected.ToRemoveAndAdd = 0
+	expected.ToRemove = 0
+
+	if !reflect.DeepEqual(expected, h) {
+		t.Fatalf("Expected %#v, got %#v instead.",
+			expected, h)
+	}
+}
+
+func TestCountHookPostDiff_Mixed(t *testing.T) {
+	h := new(CountHook)
+
+	resources := map[string]*terraform.InstanceDiff{
+		"foo": &terraform.InstanceDiff{
+			Destroy: true,
+		},
+		"bar": &terraform.InstanceDiff{},
+		"lorem": &terraform.InstanceDiff{
+			Destroy: false,
+			Attributes: map[string]*terraform.ResourceAttrDiff{
+				"foo": &terraform.ResourceAttrDiff{},
+			},
+		},
+		"ipsum": &terraform.InstanceDiff{Destroy: true},
+	}
+
+	n := &terraform.InstanceInfo{}
+
+	for _, d := range resources {
+		h.PostDiff(n, d)
+	}
+
+	expected := new(CountHook)
+	expected.ToAdd = 0
+	expected.ToChange = 1
+	expected.ToRemoveAndAdd = 0
+	expected.ToRemove = 2
+
+	if !reflect.DeepEqual(expected, h) {
+		t.Fatalf("Expected %#v, got %#v instead.",
+			expected, h)
+	}
+}
+
+func TestCountHookPostDiff_NoChange(t *testing.T) {
+	h := new(CountHook)
+
+	resources := map[string]*terraform.InstanceDiff{
+		"foo":   &terraform.InstanceDiff{},
+		"bar":   &terraform.InstanceDiff{},
+		"lorem": &terraform.InstanceDiff{},
+		"ipsum": &terraform.InstanceDiff{},
+	}
+
+	n := &terraform.InstanceInfo{}
+
+	for _, d := range resources {
+		h.PostDiff(n, d)
+	}
+
+	expected := new(CountHook)
+	expected.ToAdd = 0
+	expected.ToChange = 0
+	expected.ToRemoveAndAdd = 0
+	expected.ToRemove = 0
+
+	if !reflect.DeepEqual(expected, h) {
+		t.Fatalf("Expected %#v, got %#v instead.",
+			expected, h)
+	}
+}