diff --git a/builtin/providers/aws/core_acceptance_test.go b/builtin/providers/aws/core_acceptance_test.go
new file mode 100644
index 000000000..796380ad9
--- /dev/null
+++ b/builtin/providers/aws/core_acceptance_test.go
@@ -0,0 +1,41 @@
+package aws
+
+import (
+	"testing"
+
+	"github.com/aws/aws-sdk-go/service/ec2"
+	"github.com/hashicorp/terraform/helper/resource"
+)
+
+func TestAccAWSVPC_coreMismatchedDiffs(t *testing.T) {
+	var vpc ec2.Vpc
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckVpcDestroy,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				Config: testMatchedDiffs,
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckVpcExists("aws_vpc.test", &vpc),
+					testAccCheckVpcCidr(&vpc, "10.0.0.0/16"),
+					resource.TestCheckResourceAttr(
+						"aws_vpc.test", "cidr_block", "10.0.0.0/16"),
+				),
+			},
+		},
+	})
+}
+
+const testMatchedDiffs = `resource "aws_vpc" "test" {
+    cidr_block = "10.0.0.0/16"
+
+    tags {
+        Name = "Repro GH-4965"
+    }
+
+    lifecycle {
+        ignore_changes = ["tags"]
+    }
+}`