diff --git a/apispec-model/src/main/scala/sttp/apispec/Schema.scala b/apispec-model/src/main/scala/sttp/apispec/Schema.scala
index b892f99..cc7d885 100644
--- a/apispec-model/src/main/scala/sttp/apispec/Schema.scala
+++ b/apispec-model/src/main/scala/sttp/apispec/Schema.scala
@@ -62,7 +62,13 @@ case class Schema(
     `then`: Option[ReferenceOr[SchemaLike]] = None,
     `else`: Option[ReferenceOr[SchemaLike]] = None,
     $defs: Option[ListMap[String, SchemaLike]] = None,
-    extensions: ListMap[String, ExtensionValue] = ListMap.empty
+    extensions: ListMap[String, ExtensionValue] = ListMap.empty,
+    $id: Option[String] = None,
+    const: Option[ExampleValue] = None,
+    anyOf: List[ReferenceOr[SchemaLike]] = List.empty,
+    unevaluatedProperties: Option[ReferenceOr[SchemaLike]] = None,
+    dependentRequired: ListMap[String, List[String]] = ListMap.empty,
+    dependentSchemas: ListMap[String, ReferenceOr[SchemaLike]] = ListMap.empty
 ) extends SchemaLike
 
 case class Discriminator(propertyName: String, mapping: Option[ListMap[String, String]])
diff --git a/build.sbt b/build.sbt
index b5e4502..7792aa0 100644
--- a/build.sbt
+++ b/build.sbt
@@ -66,7 +66,8 @@ val commonNativeSettings = commonSettings ++ Seq(
 )
 
 lazy val allProjectAggregates: Seq[ProjectReference] =
-  apispecModel.projectRefs ++
+  circeTestUtils.projectRefs ++
+    apispecModel.projectRefs ++
     jsonSchemaCirce.projectRefs ++
     openapiModel.projectRefs ++
     openapiCirce.projectRefs ++
@@ -90,6 +91,28 @@ lazy val rootProject = (project in file("."))
   .settings(publish / skip := true, name := "sttp-apispec", scalaVersion := scala2_13)
   .aggregate(projectAggregates: _*)
 
+lazy val circeTestUtils: ProjectMatrix = (projectMatrix in file("circe-testutils"))
+  .settings(commonSettings)
+  .settings(
+    publish / skip := true,
+    name := "circe-testutils",
+    libraryDependencies ++= Seq(
+      "io.circe" %%% "circe-core" % circeVersion,
+      "io.circe" %%% "circe-parser" % circeVersion
+    )
+  )
+  .jvmPlatform(
+    scalaVersions = scalaJVMVersions,
+    settings = commonJvmSettings
+  )
+  .jsPlatform(
+    scalaVersions = scalaJSVersions,
+    settings = commonJsSettings
+  )
+  .nativePlatform(
+    scalaVersions = scalaNativeVersions,
+    settings = commonNativeSettings
+  )
 // apispec
 
 lazy val apispecModel: ProjectMatrix = (projectMatrix in file("apispec-model"))
@@ -134,7 +157,7 @@ lazy val jsonSchemaCirce: ProjectMatrix = (projectMatrix in file("jsonschema-cir
     scalaVersions = scalaNativeVersions,
     settings = commonNativeSettings
   )
-  .dependsOn(apispecModel)
+  .dependsOn(apispecModel, circeTestUtils % Test)
 
 // openapi
 
@@ -174,7 +197,7 @@ lazy val openapiCirce: ProjectMatrix = (projectMatrix in file("openapi-circe"))
     scalaVersions = scalaNativeVersions,
     settings = commonNativeSettings
   )
-  .dependsOn(openapiModel, jsonSchemaCirce)
+  .dependsOn(openapiModel, jsonSchemaCirce, circeTestUtils % Test)
 
 lazy val openapiCirceYaml: ProjectMatrix = (projectMatrix in file("openapi-circe-yaml"))
   .settings(commonSettings)
diff --git a/openapi-circe/src/test/scalajs/sttp/apispec/openapi/circe/ResourcePlatform.scala b/circe-testutils/src/main/scalajs/sttp/apispec/test/ResourcePlatform.scala
similarity index 50%
rename from openapi-circe/src/test/scalajs/sttp/apispec/openapi/circe/ResourcePlatform.scala
rename to circe-testutils/src/main/scalajs/sttp/apispec/test/ResourcePlatform.scala
index 9747010..cc0a254 100644
--- a/openapi-circe/src/test/scalajs/sttp/apispec/openapi/circe/ResourcePlatform.scala
+++ b/circe-testutils/src/main/scalajs/sttp/apispec/test/ResourcePlatform.scala
@@ -1,12 +1,17 @@
-package sttp.apispec.openapi.circe
+package sttp.apispec.test
 
 import io.circe.{Json, Error}
 import io.circe.parser.decode
 
 trait ResourcePlatform {
-  def rscPath(path: String): String = "openapi-circe/src/test/resources" + path
 
-  def rsc(path: String): String = {
+  /**
+   * @return Base directory of sbt project we should read resources from
+   */
+  def basedir: String
+  def resourcesPath(path: String): String = s"$basedir/src/test/resources$path"
+
+  def resourceAsString(path: String): String = {
     import scalajs.js.Dynamic.{global => g}
     val fs = g.require("fs")
 
@@ -14,11 +19,11 @@ trait ResourcePlatform {
       fs.readFileSync(name).toString
     }
 
-    readFile(rscPath(path))
+    readFile(resourcesPath(path))
   }
 
   def readJson(path: String): Either[Error, Json] = {
-    val string = rsc(path)
+    val string = resourceAsString(path)
     decode[Json](string)
   }
 }
diff --git a/openapi-circe/src/test/scalajvm/sttp/apispec/openapi/circe/ResourcePlatform.scala b/circe-testutils/src/main/scalajvm/sttp/apispec/test/ResourcePlatform.scala
similarity index 75%
rename from openapi-circe/src/test/scalajvm/sttp/apispec/openapi/circe/ResourcePlatform.scala
rename to circe-testutils/src/main/scalajvm/sttp/apispec/test/ResourcePlatform.scala
index 9251cee..217496d 100644
--- a/openapi-circe/src/test/scalajvm/sttp/apispec/openapi/circe/ResourcePlatform.scala
+++ b/circe-testutils/src/main/scalajvm/sttp/apispec/test/ResourcePlatform.scala
@@ -1,4 +1,4 @@
-package sttp.apispec.openapi.circe
+package sttp.apispec.test
 
 import io.circe._
 import io.circe.parser.decode
@@ -6,6 +6,11 @@ import java.io.{BufferedReader, InputStreamReader, StringWriter}
 import java.nio.charset.StandardCharsets
 
 trait ResourcePlatform {
+
+  /**
+   * @return Base directory of sbt project we should read resources from. Not used from JVM
+   */
+  def basedir: String
   def readJson(path: String): Either[Error, Json] = {
 
     val is = getClass.getResourceAsStream(path)
diff --git a/circe-testutils/src/main/scalanative/sttp/apispec/test/ResourcePlatform.scala b/circe-testutils/src/main/scalanative/sttp/apispec/test/ResourcePlatform.scala
new file mode 100644
index 0000000..9cf9598
--- /dev/null
+++ b/circe-testutils/src/main/scalanative/sttp/apispec/test/ResourcePlatform.scala
@@ -0,0 +1,18 @@
+package sttp.apispec.test
+
+import io.circe._
+import io.circe.parser.decode
+
+trait ResourcePlatform {
+
+  /**
+   * @return Base directory of sbt project we should read resources from
+   */
+  def basedir: String
+  def resourcesPath(path: String): String = s"$basedir/src/test/resources/$path"
+
+  def readJson(path: String): Either[Error, Json] = {
+    val string = scala.io.Source.fromFile(resourcesPath(path), "UTF-8").mkString
+    decode[Json](string)
+  }
+}
diff --git a/jsonschema-circe/src/main/scala/sttp/apispec/internal/JsonSchemaCirceDecoders.scala b/jsonschema-circe/src/main/scala/sttp/apispec/internal/JsonSchemaCirceDecoders.scala
index 327080e..44cc536 100644
--- a/jsonschema-circe/src/main/scala/sttp/apispec/internal/JsonSchemaCirceDecoders.scala
+++ b/jsonschema-circe/src/main/scala/sttp/apispec/internal/JsonSchemaCirceDecoders.scala
@@ -63,9 +63,21 @@ trait JsonSchemaCirceDecoders {
     implicit def listPatternMapDecoder[A: Decoder]: Decoder[ListMap[Pattern, ReferenceOr[A]]] =
       Decoder.decodeOption(Decoder.decodeMapLike[Pattern, ReferenceOr[A], ListMap]).map(_.getOrElse(ListMap.empty))
 
+    implicit def listdependentFieldsDecoder: Decoder[ListMap[String, List[String]]] =
+      Decoder.decodeOption(Decoder.decodeMapLike[String, List[String], ListMap]).map(_.getOrElse(ListMap.empty))
+
     implicit def listReference[A: Decoder]: Decoder[List[A]] =
       Decoder.decodeOption(Decoder.decodeList[A]).map(_.getOrElse(Nil))
 
+    def translateDefinitionsTo$def[A](decoder: Decoder[A]) = Decoder.instance { c =>
+      val modded = c.withFocus(_.mapObject { obj =>
+        val map = obj.toMap
+        val definitions = map.get("definitions").orElse(map.get("$defs"))
+        definitions.map(j => obj.remove("definitions").remove("$defs").add("$defs", j)).getOrElse(obj)
+      })
+      decoder.tryDecode(modded)
+    }
+
     def translateMinMax[A](decoder: Decoder[A]) = Decoder.instance { c =>
       val modded = c.withFocus(_.mapObject { obj =>
         val map = obj.toMap
@@ -87,11 +99,13 @@ trait JsonSchemaCirceDecoders {
 
     withExtensions(
       translateMinMax(
-        deriveDecoder[Schema].map(s =>
-          s.`type` match {
-            case Some(ArraySchemaType(x :: SchemaType.Null :: Nil)) => s.copy(`type` = Some(x), nullable = Some(true))
-            case _                                                  => s
-          }
+        translateDefinitionsTo$def(
+          deriveDecoder[Schema].map(s =>
+            s.`type` match {
+              case Some(ArraySchemaType(x :: SchemaType.Null :: Nil)) => s.copy(`type` = Some(x), nullable = Some(true))
+              case _                                                  => s
+            }
+          )
         )
       )
     )
diff --git a/jsonschema-circe/src/main/scala/sttp/apispec/internal/JsonSchemaCirceEncoders.scala b/jsonschema-circe/src/main/scala/sttp/apispec/internal/JsonSchemaCirceEncoders.scala
index 1199290..4891b8b 100644
--- a/jsonschema-circe/src/main/scala/sttp/apispec/internal/JsonSchemaCirceEncoders.scala
+++ b/jsonschema-circe/src/main/scala/sttp/apispec/internal/JsonSchemaCirceEncoders.scala
@@ -18,8 +18,10 @@ trait JsonSchemaCirceEncoders {
       val minKey = if (s.exclusiveMinimum.getOrElse(false)) "exclusiveMinimum" else "minimum"
       val maxKey = if (s.exclusiveMaximum.getOrElse(false)) "exclusiveMaximum" else "maximum"
       JsonObject(
+        s"$$id" := s.$id,
         s"$$schema" := s.$schema,
         "allOf" := s.allOf,
+        "anyOf" := s.anyOf,
         "title" := s.title,
         "required" := s.required,
         "type" := (if (s.nullable.getOrElse(false))
@@ -53,6 +55,10 @@ trait JsonSchemaCirceEncoders {
         "then" := s.`then`,
         "else" := s.`else`,
         "$defs" := s.$defs,
+        "const" := s.const,
+        "unevaluatedProperties" := s.unevaluatedProperties,
+        "dependentRequired" := s.dependentRequired,
+        "dependentSchemas" := s.dependentSchemas,
         "extensions" := s.extensions
       )
     }
diff --git a/jsonschema-circe/src/test/resources/extending-recursive.json b/jsonschema-circe/src/test/resources/extending-recursive.json
new file mode 100644
index 0000000..76cc961
--- /dev/null
+++ b/jsonschema-circe/src/test/resources/extending-recursive.json
@@ -0,0 +1,32 @@
+{
+  "$id": "https://example.com/schemas/customer",
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+
+  "type": "object",
+  "properties": {
+    "first_name": { "type": "string" },
+    "last_name": { "type": "string" },
+    "shipping_address": { "$ref": "/schemas/address" },
+    "billing_address": { "$ref": "/schemas/address" }
+  },
+  "required": ["first_name", "last_name", "shipping_address", "billing_address"],
+
+  "$defs": {
+    "address": {
+      "$id": "/schemas/address",
+      "$schema": "http://json-schema.org/draft-07/schema#",
+
+      "type": "object",
+      "properties": {
+        "street_address": { "type": "string" },
+        "city": { "type": "string" },
+        "state": { "$ref": "#/definitions/state" }
+      },
+      "required": ["street_address", "city", "state"],
+
+      "definitions": {
+        "state": { "enum": ["CA", "NY", "... etc ..."] }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/jsonschema-circe/src/test/resources/self-describing-schema.json b/jsonschema-circe/src/test/resources/self-describing-schema.json
new file mode 100644
index 0000000..51d2f6b
--- /dev/null
+++ b/jsonschema-circe/src/test/resources/self-describing-schema.json
@@ -0,0 +1,46 @@
+{
+  "$schema" : "http://iglucentral.com/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0#",
+  "description": "Meta-schema for self-describing JSON schema",
+  "self": {
+    "vendor": "com.snowplowanalytics.self-desc",
+    "name": "schema",
+    "format": "jsonschema",
+    "version": "1-0-0"
+  },
+
+  "allOf": [
+    {
+      "properties": {
+        "self": {
+          "type": "object",
+          "properties": {
+            "vendor": {
+              "type": "string",
+              "pattern": "^[a-zA-Z0-9-_.]+$"
+            },
+            "name": {
+              "type": "string",
+              "pattern": "^[a-zA-Z0-9-_]+$"
+            },
+            "format": {
+              "type": "string",
+              "pattern": "^[a-zA-Z0-9-_]+$"
+            },
+            "version": {
+              "type": "string",
+              "pattern": "^[0-9]+-[0-9]+-[0-9]+$"
+            }
+          },
+          "required": ["vendor", "name", "format", "version"],
+          "additionalProperties": false
+        }
+      },
+      "required": ["self"]
+    },
+
+    {
+      "$ref": "http://json-schema.org/draft-04/schema#"
+    }
+  ]
+
+}
diff --git a/jsonschema-circe/src/test/scala/sttp/apispec/DecoderTest.scala b/jsonschema-circe/src/test/scala/sttp/apispec/DecoderTest.scala
new file mode 100644
index 0000000..59cdb57
--- /dev/null
+++ b/jsonschema-circe/src/test/scala/sttp/apispec/DecoderTest.scala
@@ -0,0 +1,34 @@
+package sttp.apispec
+
+import org.scalatest.funsuite.AnyFunSuite
+import sttp.apispec.circe._
+import sttp.apispec.test._
+
+import scala.collection.immutable.ListMap
+
+class DecoderTest extends AnyFunSuite with ResourcePlatform {
+  override val basedir = "jsonschema-circe"
+
+  test("extending rescursive") {
+    val Right(json) = readJson("/extending-recursive.json")
+    val schema = json.as[Schema]
+    assert(schema.isRight)
+    val unsafeSchema = schema.right.get
+    val adrEither = unsafeSchema.$defs.getOrElse(ListMap.empty)("address")
+
+    adrEither match {
+      case s: Schema => assert(s.$schema == Some("http://json-schema.org/draft-07/schema#") && s.$defs.isDefined)
+      case _         => fail("Nope")
+    }
+  }
+
+  test("self-decribing-schema") {
+    val Right(json) = readJson("/self-describing-schema.json")
+    val schema = json.as[Schema]
+    assert(schema.isRight)
+
+    val unsafeSchema = schema.right.get
+    assert(unsafeSchema.description === Some("Meta-schema for self-describing JSON schema"))
+
+  }
+}
diff --git a/jsonschema-circe/src/test/scala/sttp/apispec/RoundTripTest.scala b/jsonschema-circe/src/test/scala/sttp/apispec/RoundTripTest.scala
new file mode 100644
index 0000000..d22e131
--- /dev/null
+++ b/jsonschema-circe/src/test/scala/sttp/apispec/RoundTripTest.scala
@@ -0,0 +1,17 @@
+package sttp.apispec
+
+import org.scalatest.funsuite.AnyFunSuite
+import sttp.apispec.circe._
+import sttp.apispec.test._
+import io.circe.syntax._
+import io.circe.Decoder
+
+class RoundTripTest extends AnyFunSuite with ResourcePlatform {
+  override val basedir = "jsonschema-circe"
+
+  test("Can parse self-encoded schema") {
+    val simple = Schema($schema = Some("https://json-schema.org/draft/2020-12/schema"), $id = Some("http://yourdomain.com/schemas/myschema.json"))
+    val decoded = Decoder[Schema].decodeJson(simple.asJson)
+    assert(decoded.isRight)
+  }
+}
diff --git a/openapi-circe/src/test/scala/sttp/apispec/openapi/circe/DecoderTest.scala b/openapi-circe/src/test/scala/sttp/apispec/openapi/circe/DecoderTest.scala
index 3c0f246..b9c2c68 100644
--- a/openapi-circe/src/test/scala/sttp/apispec/openapi/circe/DecoderTest.scala
+++ b/openapi-circe/src/test/scala/sttp/apispec/openapi/circe/DecoderTest.scala
@@ -2,9 +2,12 @@ package sttp.apispec
 package openapi
 package circe
 
+import sttp.apispec.test._
 import org.scalatest.funsuite.AnyFunSuite
 
 class DecoderTest extends AnyFunSuite with ResourcePlatform {
+  override val basedir = "openapi-circe"
+
   test("petstore deserialize") {
     val Right(openapi) = readJson("/petstore/basic-petstore.json").flatMap(_.as[OpenAPI]): @unchecked
 
diff --git a/openapi-circe/src/test/scala/sttp/apispec/openapi/circe/EncoderTest.scala b/openapi-circe/src/test/scala/sttp/apispec/openapi/circe/EncoderTest.scala
index bc483ea..10d0d0f 100644
--- a/openapi-circe/src/test/scala/sttp/apispec/openapi/circe/EncoderTest.scala
+++ b/openapi-circe/src/test/scala/sttp/apispec/openapi/circe/EncoderTest.scala
@@ -5,10 +5,12 @@ package threeone
 
 import io.circe.syntax._
 import org.scalatest.funsuite.AnyFunSuite
+import sttp.apispec.test._
 
 import scala.collection.immutable.ListMap
 
 class EncoderTest extends AnyFunSuite with ResourcePlatform with circe.SttpOpenAPI3_1CirceEncoders {
+  override val basedir = "openapi-circe"
 
   val petstore: OpenAPI = OpenAPI(
     openapi = "3.1.0",
diff --git a/openapi-circe/src/test/scala/sttp/apispec/openapi/circe/overridden/EncoderTest.scala b/openapi-circe/src/test/scala/sttp/apispec/openapi/circe/overridden/EncoderTest.scala
index 8866c55..9e85751 100644
--- a/openapi-circe/src/test/scala/sttp/apispec/openapi/circe/overridden/EncoderTest.scala
+++ b/openapi-circe/src/test/scala/sttp/apispec/openapi/circe/overridden/EncoderTest.scala
@@ -5,9 +5,10 @@ import sttp.apispec._
 import sttp.apispec.openapi._
 import org.scalatest.funsuite.AnyFunSuite
 import scala.collection.immutable.ListMap
-import sttp.apispec.openapi.circe.ResourcePlatform
+import sttp.apispec.test._
 
 class EncoderTest extends AnyFunSuite with ResourcePlatform {
+  override val basedir = "openapi-circe"
   def refOr[A](a: A): ReferenceOr[A] = Right(a)
 
   test("any boolean") {
diff --git a/openapi-circe/src/test/scalanative/sttp/apispec/openapi/circe/ResourcePlatform.scala b/openapi-circe/src/test/scalanative/sttp/apispec/openapi/circe/ResourcePlatform.scala
deleted file mode 100644
index 32fce67..0000000
--- a/openapi-circe/src/test/scalanative/sttp/apispec/openapi/circe/ResourcePlatform.scala
+++ /dev/null
@@ -1,13 +0,0 @@
-package sttp.apispec.openapi.circe
-
-import io.circe._
-import io.circe.parser.decode
-
-trait ResourcePlatform {
-  def rscPath(path: String): String = "openapi-circe/src/test/resources" + path
-
-  def readJson(path: String): Either[Error, Json] = {
-    val string = scala.io.Source.fromFile(rscPath(path), "UTF-8").mkString
-    decode[Json](string)
-  }
-}