diff --git a/pkg/apis/eventing/v1beta1/eventtype_validation.go b/pkg/apis/eventing/v1beta1/eventtype_validation.go
index 3688bc899e7..f24053e5034 100644
--- a/pkg/apis/eventing/v1beta1/eventtype_validation.go
+++ b/pkg/apis/eventing/v1beta1/eventtype_validation.go
@@ -33,8 +33,14 @@ func (ets *EventTypeSpec) Validate(ctx context.Context) *apis.FieldError {
 		fe := apis.ErrMissingField("type")
 		errs = errs.Also(fe)
 	}
-	// TODO validate Source is a valid URI.
-	// TODO validate Schema is a valid URI.
+	// Validate Source is a non-empty URI when provided
+	if ets.Source != nil && ets.Source.IsEmpty() {
+		errs = errs.Also(apis.ErrInvalidValue("", "source", "source URI cannot be empty"))
+	}
+	// Validate Schema is a non-empty URI when provided
+	if ets.Schema != nil && ets.Schema.IsEmpty() {
+		errs = errs.Also(apis.ErrInvalidValue("", "schema", "schema URI cannot be empty"))
+	}
 	// There is no validation of the SchemaData, it is application specific data.
 	return errs
 }
diff --git a/pkg/apis/eventing/v1beta1/eventtype_validation_test.go b/pkg/apis/eventing/v1beta1/eventtype_validation_test.go
index 80ae19a0893..b3e9ea1fd56 100644
--- a/pkg/apis/eventing/v1beta1/eventtype_validation_test.go
+++ b/pkg/apis/eventing/v1beta1/eventtype_validation_test.go
@@ -61,6 +61,23 @@ func TestEventTypeSpecValidation(t *testing.T) {
 			Source: testSource,
 			Broker: "test-broker",
 		},
+	}, {
+		name: "invalid empty source",
+		ets: &EventTypeSpec{
+			Type:   "test-type",
+			Source: &apis.URL{},
+			Broker: "test-broker",
+		},
+		want: apis.ErrInvalidValue("", "source", "source URI cannot be empty"),
+	}, {
+		name: "invalid empty schema",
+		ets: &EventTypeSpec{
+			Type:   "test-type",
+			Source: testSource,
+			Schema: &apis.URL{},
+			Broker: "test-broker",
+		},
+		want: apis.ErrInvalidValue("", "schema", "schema URI cannot be empty"),
 	},
 	}