diff --git a/modules/openapi-generator/src/main/resources/kotlin-client/libraries/multiplatform/api.mustache b/modules/openapi-generator/src/main/resources/kotlin-client/libraries/multiplatform/api.mustache
index afd9ff0a5b4..0badd27d0c1 100644
--- a/modules/openapi-generator/src/main/resources/kotlin-client/libraries/multiplatform/api.mustache
+++ b/modules/openapi-generator/src/main/resources/kotlin-client/libraries/multiplatform/api.mustache
@@ -5,6 +5,7 @@ package {{apiPackage}}
 {{/imports}}
 
 import {{packageName}}.infrastructure.*
+import io.ktor.client.HttpClient
 import io.ktor.client.HttpClientConfig
 import io.ktor.client.request.forms.formData
 import io.ktor.client.engine.HttpClientEngine
@@ -15,12 +16,19 @@ import kotlinx.serialization.descriptors.*
 import kotlinx.serialization.encoding.*
 
 {{#operations}}
-{{#nonPublicApi}}internal {{/nonPublicApi}}open class {{classname}}(
-    baseUrl: String = ApiClient.BASE_URL,
-    httpClientEngine: HttpClientEngine? = null,
-    httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
-    jsonSerializer: Json = ApiClient.JSON_DEFAULT
-) : ApiClient(baseUrl, httpClientEngine, httpClientConfig, jsonSerializer) {
+{{#nonPublicApi}}internal {{/nonPublicApi}}open class {{classname}} : ApiClient {
+
+    constructor(
+        baseUrl: String = ApiClient.BASE_URL,
+        httpClientEngine: HttpClientEngine? = null,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonSerializer: Json = ApiClient.JSON_DEFAULT
+    ) : super(baseUrl = baseUrl, httpClientEngine = httpClientEngine, httpClientConfig = httpClientConfig, jsonBlock = jsonSerializer)
+
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): super(baseUrl = baseUrl, httpClient = httpClient)
 
     {{#operation}}
     {{#allParams}}
diff --git a/modules/openapi-generator/src/main/resources/kotlin-client/libraries/multiplatform/infrastructure/ApiClient.kt.mustache b/modules/openapi-generator/src/main/resources/kotlin-client/libraries/multiplatform/infrastructure/ApiClient.kt.mustache
index df10138a04b..f2077158eb4 100644
--- a/modules/openapi-generator/src/main/resources/kotlin-client/libraries/multiplatform/infrastructure/ApiClient.kt.mustache
+++ b/modules/openapi-generator/src/main/resources/kotlin-client/libraries/multiplatform/infrastructure/ApiClient.kt.mustache
@@ -19,21 +19,32 @@ import kotlinx.serialization.json.Json
 import {{packageName}}.auth.*
 
 {{#nonPublicApi}}internal {{/nonPublicApi}}open class ApiClient(
-        private val baseUrl: String,
-        httpClientEngine: HttpClientEngine?,
-        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
-        private val jsonBlock: Json
+        private val baseUrl: String
 ) {
 
-    private val clientConfig: (HttpClientConfig<*>) -> Unit by lazy {
-        {
-            it.install(ContentNegotiation) { json(jsonBlock) }
-            httpClientConfig?.invoke(it)
+    private lateinit var client: HttpClient
+
+    constructor(
+        baseUrl: String,
+        httpClientEngine: HttpClientEngine?,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonBlock: Json,
+    ) : this(baseUrl = baseUrl) {
+        val clientConfig: (HttpClientConfig<*>) -> Unit by lazy {
+            {
+                it.install(ContentNegotiation) { json(jsonBlock) }
+                httpClientConfig?.invoke(it)
+            }
         }
+
+        client = httpClientEngine?.let { HttpClient(it, clientConfig) } ?: HttpClient(clientConfig)
     }
 
-    private val client: HttpClient by lazy {
-        httpClientEngine?.let { HttpClient(it, clientConfig) } ?: HttpClient(clientConfig)
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): this(baseUrl = baseUrl) {
+        this.client = httpClient
     }
 
     {{#hasAuthMethods}}
diff --git a/samples/client/petstore/kotlin-array-simple-string-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/DefaultApi.kt b/samples/client/petstore/kotlin-array-simple-string-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/DefaultApi.kt
index 7478c1af4ec..08ccdb94bbf 100644
--- a/samples/client/petstore/kotlin-array-simple-string-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/DefaultApi.kt
+++ b/samples/client/petstore/kotlin-array-simple-string-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/DefaultApi.kt
@@ -17,6 +17,7 @@ package org.openapitools.client.apis
 
 
 import org.openapitools.client.infrastructure.*
+import io.ktor.client.HttpClient
 import io.ktor.client.HttpClientConfig
 import io.ktor.client.request.forms.formData
 import io.ktor.client.engine.HttpClientEngine
@@ -26,12 +27,19 @@ import kotlinx.serialization.*
 import kotlinx.serialization.descriptors.*
 import kotlinx.serialization.encoding.*
 
-open class DefaultApi(
-    baseUrl: String = ApiClient.BASE_URL,
-    httpClientEngine: HttpClientEngine? = null,
-    httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
-    jsonSerializer: Json = ApiClient.JSON_DEFAULT
-) : ApiClient(baseUrl, httpClientEngine, httpClientConfig, jsonSerializer) {
+open class DefaultApi : ApiClient {
+
+    constructor(
+        baseUrl: String = ApiClient.BASE_URL,
+        httpClientEngine: HttpClientEngine? = null,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonSerializer: Json = ApiClient.JSON_DEFAULT
+    ) : super(baseUrl = baseUrl, httpClientEngine = httpClientEngine, httpClientConfig = httpClientConfig, jsonBlock = jsonSerializer)
+
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): super(baseUrl = baseUrl, httpClient = httpClient)
 
     /**
      * 
diff --git a/samples/client/petstore/kotlin-array-simple-string-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt b/samples/client/petstore/kotlin-array-simple-string-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
index 789d093c0c7..70d03d97b87 100644
--- a/samples/client/petstore/kotlin-array-simple-string-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
+++ b/samples/client/petstore/kotlin-array-simple-string-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
@@ -19,21 +19,32 @@ import kotlinx.serialization.json.Json
 import org.openapitools.client.auth.*
 
 open class ApiClient(
-        private val baseUrl: String,
-        httpClientEngine: HttpClientEngine?,
-        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
-        private val jsonBlock: Json
+        private val baseUrl: String
 ) {
 
-    private val clientConfig: (HttpClientConfig<*>) -> Unit by lazy {
-        {
-            it.install(ContentNegotiation) { json(jsonBlock) }
-            httpClientConfig?.invoke(it)
+    private lateinit var client: HttpClient
+
+    constructor(
+        baseUrl: String,
+        httpClientEngine: HttpClientEngine?,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonBlock: Json,
+    ) : this(baseUrl = baseUrl) {
+        val clientConfig: (HttpClientConfig<*>) -> Unit by lazy {
+            {
+                it.install(ContentNegotiation) { json(jsonBlock) }
+                httpClientConfig?.invoke(it)
+            }
         }
+
+        client = httpClientEngine?.let { HttpClient(it, clientConfig) } ?: HttpClient(clientConfig)
     }
 
-    private val client: HttpClient by lazy {
-        httpClientEngine?.let { HttpClient(it, clientConfig) } ?: HttpClient(clientConfig)
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): this(baseUrl = baseUrl) {
+        this.client = httpClient
     }
 
     private val authentications: kotlin.collections.Map<String, Authentication>? = null
diff --git a/samples/client/petstore/kotlin-bigdecimal-default-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/DefaultApi.kt b/samples/client/petstore/kotlin-bigdecimal-default-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/DefaultApi.kt
index 3ca371d4e09..56c0a2aeadc 100644
--- a/samples/client/petstore/kotlin-bigdecimal-default-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/DefaultApi.kt
+++ b/samples/client/petstore/kotlin-bigdecimal-default-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/DefaultApi.kt
@@ -18,6 +18,7 @@ package org.openapitools.client.apis
 import org.openapitools.client.models.Apa
 
 import org.openapitools.client.infrastructure.*
+import io.ktor.client.HttpClient
 import io.ktor.client.HttpClientConfig
 import io.ktor.client.request.forms.formData
 import io.ktor.client.engine.HttpClientEngine
@@ -27,12 +28,19 @@ import kotlinx.serialization.*
 import kotlinx.serialization.descriptors.*
 import kotlinx.serialization.encoding.*
 
-open class DefaultApi(
-    baseUrl: String = ApiClient.BASE_URL,
-    httpClientEngine: HttpClientEngine? = null,
-    httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
-    jsonSerializer: Json = ApiClient.JSON_DEFAULT
-) : ApiClient(baseUrl, httpClientEngine, httpClientConfig, jsonSerializer) {
+open class DefaultApi : ApiClient {
+
+    constructor(
+        baseUrl: String = ApiClient.BASE_URL,
+        httpClientEngine: HttpClientEngine? = null,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonSerializer: Json = ApiClient.JSON_DEFAULT
+    ) : super(baseUrl = baseUrl, httpClientEngine = httpClientEngine, httpClientConfig = httpClientConfig, jsonBlock = jsonSerializer)
+
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): super(baseUrl = baseUrl, httpClient = httpClient)
 
     /**
      * 
diff --git a/samples/client/petstore/kotlin-bigdecimal-default-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt b/samples/client/petstore/kotlin-bigdecimal-default-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
index 789d093c0c7..70d03d97b87 100644
--- a/samples/client/petstore/kotlin-bigdecimal-default-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
+++ b/samples/client/petstore/kotlin-bigdecimal-default-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
@@ -19,21 +19,32 @@ import kotlinx.serialization.json.Json
 import org.openapitools.client.auth.*
 
 open class ApiClient(
-        private val baseUrl: String,
-        httpClientEngine: HttpClientEngine?,
-        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
-        private val jsonBlock: Json
+        private val baseUrl: String
 ) {
 
-    private val clientConfig: (HttpClientConfig<*>) -> Unit by lazy {
-        {
-            it.install(ContentNegotiation) { json(jsonBlock) }
-            httpClientConfig?.invoke(it)
+    private lateinit var client: HttpClient
+
+    constructor(
+        baseUrl: String,
+        httpClientEngine: HttpClientEngine?,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonBlock: Json,
+    ) : this(baseUrl = baseUrl) {
+        val clientConfig: (HttpClientConfig<*>) -> Unit by lazy {
+            {
+                it.install(ContentNegotiation) { json(jsonBlock) }
+                httpClientConfig?.invoke(it)
+            }
         }
+
+        client = httpClientEngine?.let { HttpClient(it, clientConfig) } ?: HttpClient(clientConfig)
     }
 
-    private val client: HttpClient by lazy {
-        httpClientEngine?.let { HttpClient(it, clientConfig) } ?: HttpClient(clientConfig)
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): this(baseUrl = baseUrl) {
+        this.client = httpClient
     }
 
     private val authentications: kotlin.collections.Map<String, Authentication>? = null
diff --git a/samples/client/petstore/kotlin-default-values-multiplatform/gradlew b/samples/client/petstore/kotlin-default-values-multiplatform/gradlew
old mode 100644
new mode 100755
diff --git a/samples/client/petstore/kotlin-default-values-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/DefaultApi.kt b/samples/client/petstore/kotlin-default-values-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/DefaultApi.kt
index 1b7c26ff63f..3e5ce541214 100644
--- a/samples/client/petstore/kotlin-default-values-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/DefaultApi.kt
+++ b/samples/client/petstore/kotlin-default-values-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/DefaultApi.kt
@@ -17,6 +17,7 @@ package org.openapitools.client.apis
 
 
 import org.openapitools.client.infrastructure.*
+import io.ktor.client.HttpClient
 import io.ktor.client.HttpClientConfig
 import io.ktor.client.request.forms.formData
 import io.ktor.client.engine.HttpClientEngine
@@ -26,12 +27,19 @@ import kotlinx.serialization.*
 import kotlinx.serialization.descriptors.*
 import kotlinx.serialization.encoding.*
 
-open class DefaultApi(
-    baseUrl: String = ApiClient.BASE_URL,
-    httpClientEngine: HttpClientEngine? = null,
-    httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
-    jsonSerializer: Json = ApiClient.JSON_DEFAULT
-) : ApiClient(baseUrl, httpClientEngine, httpClientConfig, jsonSerializer) {
+open class DefaultApi : ApiClient {
+
+    constructor(
+        baseUrl: String = ApiClient.BASE_URL,
+        httpClientEngine: HttpClientEngine? = null,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonSerializer: Json = ApiClient.JSON_DEFAULT
+    ) : super(baseUrl = baseUrl, httpClientEngine = httpClientEngine, httpClientConfig = httpClientConfig, jsonBlock = jsonSerializer)
+
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): super(baseUrl = baseUrl, httpClient = httpClient)
 
     /**
      * Tests default values
diff --git a/samples/client/petstore/kotlin-default-values-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt b/samples/client/petstore/kotlin-default-values-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
index 789d093c0c7..70d03d97b87 100644
--- a/samples/client/petstore/kotlin-default-values-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
+++ b/samples/client/petstore/kotlin-default-values-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
@@ -19,21 +19,32 @@ import kotlinx.serialization.json.Json
 import org.openapitools.client.auth.*
 
 open class ApiClient(
-        private val baseUrl: String,
-        httpClientEngine: HttpClientEngine?,
-        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
-        private val jsonBlock: Json
+        private val baseUrl: String
 ) {
 
-    private val clientConfig: (HttpClientConfig<*>) -> Unit by lazy {
-        {
-            it.install(ContentNegotiation) { json(jsonBlock) }
-            httpClientConfig?.invoke(it)
+    private lateinit var client: HttpClient
+
+    constructor(
+        baseUrl: String,
+        httpClientEngine: HttpClientEngine?,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonBlock: Json,
+    ) : this(baseUrl = baseUrl) {
+        val clientConfig: (HttpClientConfig<*>) -> Unit by lazy {
+            {
+                it.install(ContentNegotiation) { json(jsonBlock) }
+                httpClientConfig?.invoke(it)
+            }
         }
+
+        client = httpClientEngine?.let { HttpClient(it, clientConfig) } ?: HttpClient(clientConfig)
     }
 
-    private val client: HttpClient by lazy {
-        httpClientEngine?.let { HttpClient(it, clientConfig) } ?: HttpClient(clientConfig)
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): this(baseUrl = baseUrl) {
+        this.client = httpClient
     }
 
     private val authentications: kotlin.collections.Map<String, Authentication>? = null
diff --git a/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/PetApi.kt b/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/PetApi.kt
index 4eccd57c8aa..28cc788be29 100644
--- a/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/PetApi.kt
+++ b/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/PetApi.kt
@@ -19,6 +19,7 @@ import org.openapitools.client.models.ModelApiResponse
 import org.openapitools.client.models.Pet
 
 import org.openapitools.client.infrastructure.*
+import io.ktor.client.HttpClient
 import io.ktor.client.HttpClientConfig
 import io.ktor.client.request.forms.formData
 import io.ktor.client.engine.HttpClientEngine
@@ -28,12 +29,19 @@ import kotlinx.serialization.*
 import kotlinx.serialization.descriptors.*
 import kotlinx.serialization.encoding.*
 
-open class PetApi(
-    baseUrl: String = ApiClient.BASE_URL,
-    httpClientEngine: HttpClientEngine? = null,
-    httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
-    jsonSerializer: Json = ApiClient.JSON_DEFAULT
-) : ApiClient(baseUrl, httpClientEngine, httpClientConfig, jsonSerializer) {
+open class PetApi : ApiClient {
+
+    constructor(
+        baseUrl: String = ApiClient.BASE_URL,
+        httpClientEngine: HttpClientEngine? = null,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonSerializer: Json = ApiClient.JSON_DEFAULT
+    ) : super(baseUrl = baseUrl, httpClientEngine = httpClientEngine, httpClientConfig = httpClientConfig, jsonBlock = jsonSerializer)
+
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): super(baseUrl = baseUrl, httpClient = httpClient)
 
     /**
      * Add a new pet to the store
diff --git a/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/StoreApi.kt b/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/StoreApi.kt
index 2a4edd8acba..f6b78d2262e 100644
--- a/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/StoreApi.kt
+++ b/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/StoreApi.kt
@@ -18,6 +18,7 @@ package org.openapitools.client.apis
 import org.openapitools.client.models.Order
 
 import org.openapitools.client.infrastructure.*
+import io.ktor.client.HttpClient
 import io.ktor.client.HttpClientConfig
 import io.ktor.client.request.forms.formData
 import io.ktor.client.engine.HttpClientEngine
@@ -27,12 +28,19 @@ import kotlinx.serialization.*
 import kotlinx.serialization.descriptors.*
 import kotlinx.serialization.encoding.*
 
-open class StoreApi(
-    baseUrl: String = ApiClient.BASE_URL,
-    httpClientEngine: HttpClientEngine? = null,
-    httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
-    jsonSerializer: Json = ApiClient.JSON_DEFAULT
-) : ApiClient(baseUrl, httpClientEngine, httpClientConfig, jsonSerializer) {
+open class StoreApi : ApiClient {
+
+    constructor(
+        baseUrl: String = ApiClient.BASE_URL,
+        httpClientEngine: HttpClientEngine? = null,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonSerializer: Json = ApiClient.JSON_DEFAULT
+    ) : super(baseUrl = baseUrl, httpClientEngine = httpClientEngine, httpClientConfig = httpClientConfig, jsonBlock = jsonSerializer)
+
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): super(baseUrl = baseUrl, httpClient = httpClient)
 
     /**
      * Delete purchase order by ID
diff --git a/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/UserApi.kt b/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/UserApi.kt
index e667f0d796b..510d4c46c7b 100644
--- a/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/UserApi.kt
+++ b/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/apis/UserApi.kt
@@ -18,6 +18,7 @@ package org.openapitools.client.apis
 import org.openapitools.client.models.User
 
 import org.openapitools.client.infrastructure.*
+import io.ktor.client.HttpClient
 import io.ktor.client.HttpClientConfig
 import io.ktor.client.request.forms.formData
 import io.ktor.client.engine.HttpClientEngine
@@ -27,12 +28,19 @@ import kotlinx.serialization.*
 import kotlinx.serialization.descriptors.*
 import kotlinx.serialization.encoding.*
 
-open class UserApi(
-    baseUrl: String = ApiClient.BASE_URL,
-    httpClientEngine: HttpClientEngine? = null,
-    httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
-    jsonSerializer: Json = ApiClient.JSON_DEFAULT
-) : ApiClient(baseUrl, httpClientEngine, httpClientConfig, jsonSerializer) {
+open class UserApi : ApiClient {
+
+    constructor(
+        baseUrl: String = ApiClient.BASE_URL,
+        httpClientEngine: HttpClientEngine? = null,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonSerializer: Json = ApiClient.JSON_DEFAULT
+    ) : super(baseUrl = baseUrl, httpClientEngine = httpClientEngine, httpClientConfig = httpClientConfig, jsonBlock = jsonSerializer)
+
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): super(baseUrl = baseUrl, httpClient = httpClient)
 
     /**
      * Create user
diff --git a/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt b/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
index e7439fc9761..b22722a1fb3 100644
--- a/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
+++ b/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
@@ -19,21 +19,32 @@ import kotlinx.serialization.json.Json
 import org.openapitools.client.auth.*
 
 open class ApiClient(
-        private val baseUrl: String,
-        httpClientEngine: HttpClientEngine?,
-        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
-        private val jsonBlock: Json
+        private val baseUrl: String
 ) {
 
-    private val clientConfig: (HttpClientConfig<*>) -> Unit by lazy {
-        {
-            it.install(ContentNegotiation) { json(jsonBlock) }
-            httpClientConfig?.invoke(it)
+    private lateinit var client: HttpClient
+
+    constructor(
+        baseUrl: String,
+        httpClientEngine: HttpClientEngine?,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonBlock: Json,
+    ) : this(baseUrl = baseUrl) {
+        val clientConfig: (HttpClientConfig<*>) -> Unit by lazy {
+            {
+                it.install(ContentNegotiation) { json(jsonBlock) }
+                httpClientConfig?.invoke(it)
+            }
         }
+
+        client = httpClientEngine?.let { HttpClient(it, clientConfig) } ?: HttpClient(clientConfig)
     }
 
-    private val client: HttpClient by lazy {
-        httpClientEngine?.let { HttpClient(it, clientConfig) } ?: HttpClient(clientConfig)
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): this(baseUrl = baseUrl) {
+        this.client = httpClient
     }
 
     private val authentications: kotlin.collections.Map<String, Authentication> by lazy {