diff --git a/app/src/processing/app/Schema.kt b/app/src/processing/app/Schema.kt
index a0f6f7b99..a02bf1da7 100644
--- a/app/src/processing/app/Schema.kt
+++ b/app/src/processing/app/Schema.kt
@@ -1,5 +1,9 @@
 package processing.app
 
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import processing.app.ui.Editor
 import java.io.File
 import java.io.FileOutputStream
@@ -13,6 +17,8 @@ import java.util.*
 class Schema {
     companion object{
         private var base: Base? = null
+        val jobs = mutableListOf<Job>()
+
         @JvmStatic
         fun handleSchema(input: String, base: Base): Editor?{
             this.base = base
@@ -92,8 +98,9 @@ class Schema {
             }
 
         }
+
+        private val scope = CoroutineScope(Dispatchers.Default)
         private fun downloadFiles(uri: URI, urlList: String, targetFolder: File, extension: String = ""){
-            Thread{
                 targetFolder.mkdirs()
 
                 val base = uri.path.split("/")
@@ -128,15 +135,20 @@ class Schema {
                                 URL("https://$content").path.isNotBlank() -> "https://$content"
                                 else -> "https://$base/$content"
                             })
-                            url.openStream().use { input ->
-                                target.outputStream().use { output ->
-                                    input.copyTo(output)
+                            val download = scope.launch{
+                                url.openStream().use { input ->
+                                    target.outputStream().use { output ->
+                                        input.copyTo(output)
+                                    }
                                 }
                             }
+                            jobs.add(download)
+                            download.invokeOnCompletion {
+                                jobs.remove(download)
+                            }
                         }
 
                     }
-            }.start()
         }
 
 
diff --git a/app/test/processing/app/SchemaTest.kt b/app/test/processing/app/SchemaTest.kt
index 955172d17..73f7f9c9c 100644
--- a/app/test/processing/app/SchemaTest.kt
+++ b/app/test/processing/app/SchemaTest.kt
@@ -1,5 +1,7 @@
 package processing.app
 
+import kotlinx.coroutines.joinAll
+import kotlinx.coroutines.runBlocking
 import org.junit.jupiter.params.ParameterizedTest
 import org.junit.jupiter.params.provider.ValueSource
 import org.mockito.ArgumentCaptor
@@ -65,8 +67,8 @@ class SchemaTest {
 
         val base64 = Base64.encode(sketch.toByteArray())
         Schema.handleSchema("pde://sketch/base64/$base64?pde=AnotherFile:$base64", base)
-        val captor = ArgumentCaptor.forClass(String::class.java)
 
+        val captor = ArgumentCaptor.forClass(String::class.java)
         verify(base).handleOpenUntitled(captor.capture())
 
         val file = File(captor.value)
@@ -82,6 +84,7 @@ class SchemaTest {
     @Test
     fun testURLSketch() {
         Schema.handleSchema("pde://sketch/url/github.com/processing/processing-examples/raw/refs/heads/main/Basics/Arrays/Array/Array.pde", base)
+        waitForSchemeJobsToComplete()
 
         val captor = ArgumentCaptor.forClass(String::class.java)
         verify(base).handleOpenUntitled(captor.capture())
@@ -104,6 +107,7 @@ class SchemaTest {
     ])
     fun testURLSketchWithFile(file: String){
         Schema.handleSchema("pde://sketch/url/github.com/processing/processing-examples/raw/refs/heads/main/Basics/Arrays/ArrayObjects/ArrayObjects.pde?pde=$file", base)
+        waitForSchemeJobsToComplete()
 
         val captor = ArgumentCaptor.forClass(String::class.java)
         verify(base).handleOpenUntitled(captor.capture())
@@ -126,4 +130,10 @@ class SchemaTest {
             Preferences.save()
         }
     }
+
+    fun waitForSchemeJobsToComplete(){
+        runBlocking {
+            joinAll(*Schema.jobs.toTypedArray())
+        }
+    }
 }
\ No newline at end of file