diff --git a/go.mod b/go.mod
index f11422498e0..89fc049c640 100644
--- a/go.mod
+++ b/go.mod
@@ -50,7 +50,7 @@ require (
 	knative.dev/hack v0.0.0-20240123162936-f3f03ac0ab1a
 	knative.dev/hack/schema v0.0.0-20240123162936-f3f03ac0ab1a
 	knative.dev/pkg v0.0.0-20240116073220-b488e7be5902
-	knative.dev/reconciler-test v0.0.0-20240228213824-a2d9404ca4e7
+	knative.dev/reconciler-test v0.0.0-20240319084821-8c063dd50b3c
 	sigs.k8s.io/yaml v1.4.0
 )
 
diff --git a/go.sum b/go.sum
index 241ffbb19ce..aab7d595e54 100644
--- a/go.sum
+++ b/go.sum
@@ -894,8 +894,8 @@ knative.dev/hack/schema v0.0.0-20240123162936-f3f03ac0ab1a h1:9FY/uq1m9K+Ig9tt4y
 knative.dev/hack/schema v0.0.0-20240123162936-f3f03ac0ab1a/go.mod h1:3pWwBLnTZSM9psSgCAvhKOHIPTzqfEMlWRpDu6IYhK0=
 knative.dev/pkg v0.0.0-20240116073220-b488e7be5902 h1:H6+JJN23fhwYWCHY1339sY6uhIyoUwDy1a8dN233fdk=
 knative.dev/pkg v0.0.0-20240116073220-b488e7be5902/go.mod h1:NYk8mMYoLkO7CQWnNkti4YGGnvLxN6MIDbUvtgeo0C0=
-knative.dev/reconciler-test v0.0.0-20240228213824-a2d9404ca4e7 h1:nw0ZbYpCwmYIm9zT5VoQ/JFAAUOcQ04wGv/ODh6tyc0=
-knative.dev/reconciler-test v0.0.0-20240228213824-a2d9404ca4e7/go.mod h1:PdI3uCI/8URA+hyBvWqZ2pwCIvX/4/nqCNsdW1cQauM=
+knative.dev/reconciler-test v0.0.0-20240319084821-8c063dd50b3c h1:WVonoeQO5d/OKTkUfbFOW/eStpuyzaTN+fgx0twCUAA=
+knative.dev/reconciler-test v0.0.0-20240319084821-8c063dd50b3c/go.mod h1:PdI3uCI/8URA+hyBvWqZ2pwCIvX/4/nqCNsdW1cQauM=
 pgregory.net/rapid v1.1.0 h1:CMa0sjHSru3puNx+J0MIAuiiEV4N0qj8/cMWGBBCsjw=
 pgregory.net/rapid v1.1.0/go.mod h1:PY5XlDGj0+V1FCq0o192FdRhpKHGTRIWBgqjDBTrq04=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
diff --git a/vendor/knative.dev/reconciler-test/pkg/eventshub/forwarder/forwarder.go b/vendor/knative.dev/reconciler-test/pkg/eventshub/forwarder/forwarder.go
index 8d755187e83..e0d2e8338b7 100644
--- a/vendor/knative.dev/reconciler-test/pkg/eventshub/forwarder/forwarder.go
+++ b/vendor/knative.dev/reconciler-test/pkg/eventshub/forwarder/forwarder.go
@@ -165,6 +165,8 @@ func (o *Forwarder) ServeHTTP(writer http.ResponseWriter, request *http.Request)
 	req := request.Clone(requestCtx)
 	// It is an error to set this field in an HTTP client request.
 	req.RequestURI = ""
+	// We don't want to use the original request Host header, so drop it from the clone
+	req.Host = ""
 
 	u, err := url.Parse(o.Sink)
 	if err != nil {
diff --git a/vendor/modules.txt b/vendor/modules.txt
index fdffa375ad2..e15569ffe6c 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -1385,7 +1385,7 @@ knative.dev/pkg/webhook/resourcesemantics
 knative.dev/pkg/webhook/resourcesemantics/conversion
 knative.dev/pkg/webhook/resourcesemantics/defaulting
 knative.dev/pkg/webhook/resourcesemantics/validation
-# knative.dev/reconciler-test v0.0.0-20240228213824-a2d9404ca4e7
+# knative.dev/reconciler-test v0.0.0-20240319084821-8c063dd50b3c
 ## explicit; go 1.20
 knative.dev/reconciler-test/cmd/eventshub
 knative.dev/reconciler-test/pkg/environment