diff --git a/core/src/test/scala/sttp/client4/testing/HttpTest.scala b/core/src/test/scala/sttp/client4/testing/HttpTest.scala
index 3e4a67c82..ad368c06d 100644
--- a/core/src/test/scala/sttp/client4/testing/HttpTest.scala
+++ b/core/src/test/scala/sttp/client4/testing/HttpTest.scala
@@ -14,9 +14,6 @@ import java.io.{ByteArrayInputStream, UnsupportedEncodingException}
 import java.nio.ByteBuffer
 import scala.concurrent.Future
 import scala.concurrent.duration._
-import sttp.model.Encodings
-import java.util.zip.GZIPInputStream
-import java.util.zip.InflaterInputStream
 
 trait HttpTest[F[_]]
     extends AsyncFreeSpec
@@ -467,38 +464,6 @@ trait HttpTest[F[_]]
         }
       }
     }
-
-    "should compress request body using gzip" in {
-      val req = basicRequest
-        .compressBody(Encodings.Gzip)
-        .response(asByteArrayAlways)
-        .post(uri"$endpoint/echo/exact")
-        .body("I'm not compressed")
-      req.send(backend).toFuture().map { resp =>
-        resp.code shouldBe StatusCode.Ok
-
-        val gzipInputStream = new GZIPInputStream(new ByteArrayInputStream(resp.body))
-        val decompressedBytes = gzipInputStream.readAllBytes()
-
-        new String(decompressedBytes) shouldBe "I'm not compressed"
-      }
-    }
-
-    "should compress request body using deflate" in {
-      val req = basicRequest
-        .compressBody(Encodings.Deflate)
-        .response(asByteArrayAlways)
-        .post(uri"$endpoint/echo/exact")
-        .body("I'm not compressed")
-      req.send(backend).toFuture().map { resp =>
-        resp.code shouldBe StatusCode.Ok
-
-        val inflaterInputStream = new InflaterInputStream(new ByteArrayInputStream(resp.body))
-        val decompressedBytes = inflaterInputStream.readAllBytes()
-
-        new String(decompressedBytes) shouldBe "I'm not compressed"
-      }
-    }
   }
 
   // in JavaScript the only way to set the content type is to use a Blob which defaults the filename to 'blob'
diff --git a/core/src/test/scalajvm/sttp/client4/testing/HttpTestExtensions.scala b/core/src/test/scalajvm/sttp/client4/testing/HttpTestExtensions.scala
index 9f82a32ac..52938cacd 100644
--- a/core/src/test/scalajvm/sttp/client4/testing/HttpTestExtensions.scala
+++ b/core/src/test/scalajvm/sttp/client4/testing/HttpTestExtensions.scala
@@ -12,6 +12,10 @@ import HttpTest.endpoint
 import org.scalatest.freespec.AsyncFreeSpecLike
 import sttp.client4.wrappers.{DigestAuthenticationBackend, FollowRedirectsBackend, TooManyRedirectsException}
 import sttp.model.headers.CookieWithMeta
+import sttp.model.Encodings
+import java.util.zip.GZIPInputStream
+import java.io.ByteArrayInputStream
+import java.util.zip.InflaterInputStream
 
 trait HttpTestExtensions[F[_]] extends AsyncFreeSpecLike { self: HttpTest[F] =>
   protected def supportsResponseAsInputStream = true
@@ -198,6 +202,40 @@ trait HttpTestExtensions[F[_]] extends AsyncFreeSpecLike { self: HttpTest[F] =>
     }
   }
 
+  "compression" - {
+    "should compress request body using gzip" in {
+      val req = basicRequest
+        .compressBody(Encodings.Gzip)
+        .response(asByteArrayAlways)
+        .post(uri"$endpoint/echo/exact")
+        .body("I'm not compressed")
+      req.send(backend).toFuture().map { resp =>
+        resp.code shouldBe StatusCode.Ok
+
+        val gzipInputStream = new GZIPInputStream(new ByteArrayInputStream(resp.body))
+        val decompressedBytes = gzipInputStream.readAllBytes()
+
+        new String(decompressedBytes) shouldBe "I'm not compressed"
+      }
+    }
+
+    "should compress request body using deflate" in {
+      val req = basicRequest
+        .compressBody(Encodings.Deflate)
+        .response(asByteArrayAlways)
+        .post(uri"$endpoint/echo/exact")
+        .body("I'm not compressed")
+      req.send(backend).toFuture().map { resp =>
+        resp.code shouldBe StatusCode.Ok
+
+        val inflaterInputStream = new InflaterInputStream(new ByteArrayInputStream(resp.body))
+        val decompressedBytes = inflaterInputStream.readAllBytes()
+
+        new String(decompressedBytes) shouldBe "I'm not compressed"
+      }
+    }
+  }
+
   private def withTemporaryFile[T](content: Option[Array[Byte]])(f: File => Future[T]): Future[T] = {
     val file = Files.createTempFile("sttp", "sttp")
     val result = Future {