diff --git a/internal/wire/ack_frame_legacy_test.go b/internal/wire/ack_frame_legacy_test.go
index 612fbb34..075cdff4 100644
--- a/internal/wire/ack_frame_legacy_test.go
+++ b/internal/wire/ack_frame_legacy_test.go
@@ -1126,156 +1126,4 @@ var _ = Describe("ACK Frame (for gQUIC)", func() {
 			})
 		})
 	})
-
-	Context("ACK range validator", func() {
-		It("accepts an ACK without NACK Ranges", func() {
-			ack := AckFrame{LargestAcked: 7}
-			Expect(ack.validateAckRanges()).To(BeTrue())
-		})
-
-		It("rejects ACK ranges with a single range", func() {
-			ack := AckFrame{
-				LargestAcked: 10,
-				AckRanges:    []AckRange{{Smallest: 1, Largest: 10}},
-			}
-			Expect(ack.validateAckRanges()).To(BeFalse())
-		})
-
-		It("rejects ACK ranges with Largest of the first range unequal to LargestObserved", func() {
-			ack := AckFrame{
-				LargestAcked: 10,
-				AckRanges: []AckRange{
-					{Smallest: 8, Largest: 9},
-					{Smallest: 2, Largest: 3},
-				},
-			}
-			Expect(ack.validateAckRanges()).To(BeFalse())
-		})
-
-		It("rejects ACK ranges with Smallest greater than Largest", func() {
-			ack := AckFrame{
-				LargestAcked: 10,
-				AckRanges: []AckRange{
-					{Smallest: 8, Largest: 10},
-					{Smallest: 4, Largest: 3},
-				},
-			}
-			Expect(ack.validateAckRanges()).To(BeFalse())
-		})
-
-		It("rejects ACK ranges with Smallest greater than LargestObserved", func() {
-			ack := AckFrame{
-				LargestAcked: 5,
-				AckRanges: []AckRange{
-					{Smallest: 4, Largest: 10},
-					{Smallest: 1, Largest: 2},
-				},
-			}
-			Expect(ack.validateAckRanges()).To(BeFalse())
-		})
-
-		It("rejects ACK ranges in the wrong order", func() {
-			ack := AckFrame{
-				LargestAcked: 7,
-				AckRanges: []AckRange{
-					{Smallest: 2, Largest: 2},
-					{Smallest: 6, Largest: 7},
-				},
-			}
-			Expect(ack.validateAckRanges()).To(BeFalse())
-		})
-
-		It("rejects with overlapping ACK ranges", func() {
-			ack := AckFrame{
-				LargestAcked: 7,
-				AckRanges: []AckRange{
-					{Smallest: 5, Largest: 7},
-					{Smallest: 2, Largest: 5},
-				},
-			}
-			Expect(ack.validateAckRanges()).To(BeFalse())
-		})
-
-		It("rejects ACK ranges that are part of a larger ACK range", func() {
-			ack := AckFrame{
-				LargestAcked: 7,
-				AckRanges: []AckRange{
-					{Smallest: 4, Largest: 7},
-					{Smallest: 5, Largest: 6},
-				},
-			}
-			Expect(ack.validateAckRanges()).To(BeFalse())
-		})
-
-		It("rejects with directly adjacent ACK ranges", func() {
-			ack := AckFrame{
-				LargestAcked: 7,
-				AckRanges: []AckRange{
-					{Smallest: 5, Largest: 7},
-					{Smallest: 2, Largest: 4},
-				},
-			}
-			Expect(ack.validateAckRanges()).To(BeFalse())
-		})
-
-		It("accepts an ACK with one lost packet", func() {
-			ack := AckFrame{
-				LargestAcked: 10,
-				AckRanges: []AckRange{
-					{Smallest: 5, Largest: 10},
-					{Smallest: 1, Largest: 3},
-				},
-			}
-			Expect(ack.validateAckRanges()).To(BeTrue())
-		})
-
-		It("accepts an ACK with multiple lost packets", func() {
-			ack := AckFrame{
-				LargestAcked: 20,
-				AckRanges: []AckRange{
-					{Smallest: 15, Largest: 20},
-					{Smallest: 10, Largest: 12},
-					{Smallest: 1, Largest: 3},
-				},
-			}
-			Expect(ack.validateAckRanges()).To(BeTrue())
-		})
-	})
-
-	Context("check if ACK frame acks a certain packet", func() {
-		It("works with an ACK without any ranges", func() {
-			f := AckFrame{
-				LowestAcked:  5,
-				LargestAcked: 10,
-			}
-			Expect(f.AcksPacket(1)).To(BeFalse())
-			Expect(f.AcksPacket(4)).To(BeFalse())
-			Expect(f.AcksPacket(5)).To(BeTrue())
-			Expect(f.AcksPacket(8)).To(BeTrue())
-			Expect(f.AcksPacket(10)).To(BeTrue())
-			Expect(f.AcksPacket(11)).To(BeFalse())
-			Expect(f.AcksPacket(20)).To(BeFalse())
-		})
-
-		It("works with an ACK with multiple ACK ranges", func() {
-			f := AckFrame{
-				LowestAcked:  5,
-				LargestAcked: 20,
-				AckRanges: []AckRange{
-					{Smallest: 15, Largest: 20},
-					{Smallest: 5, Largest: 8},
-				},
-			}
-			Expect(f.AcksPacket(4)).To(BeFalse())
-			Expect(f.AcksPacket(5)).To(BeTrue())
-			Expect(f.AcksPacket(7)).To(BeTrue())
-			Expect(f.AcksPacket(8)).To(BeTrue())
-			Expect(f.AcksPacket(9)).To(BeFalse())
-			Expect(f.AcksPacket(14)).To(BeFalse())
-			Expect(f.AcksPacket(15)).To(BeTrue())
-			Expect(f.AcksPacket(18)).To(BeTrue())
-			Expect(f.AcksPacket(20)).To(BeTrue())
-			Expect(f.AcksPacket(21)).To(BeFalse())
-		})
-	})
 })