diff --git a/src/test/java/htsjdk/samtools/util/AsyncWriteSortingCollectionTest.java b/src/test/java/htsjdk/samtools/util/AsyncWriteSortingCollectionTest.java
new file mode 100644
index 0000000000..5565ed6da4
--- /dev/null
+++ b/src/test/java/htsjdk/samtools/util/AsyncWriteSortingCollectionTest.java
@@ -0,0 +1,53 @@
+/*
+ * The MIT License
+ *
+ * Copyright (c) 2009 The Broad Institute
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package htsjdk.samtools.util;
+
+import org.testng.annotations.AfterMethod;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.DataProvider;
+
+public class AsyncWriteSortingCollectionTest extends SortingCollectionTest {
+
+    @BeforeClass void setupClass() {System.setProperty("samjdk.sort_col_threads", "2");}
+
+    @BeforeMethod void setup() { resetTmpDir(); }
+    @AfterMethod void tearDown() { resetTmpDir(); }
+
+    @DataProvider(name = "test1")
+    public Object[][] createTestData() {
+        return new Object[][] {
+                {"empty", 0, 100},
+                {"singleton", 1, 100},
+
+                // maxRecordInRam for AsyncWriteSortingCollection is equals to 300 / (sort_col_threads + 1) = 100
+                {"less than threshold", 100, 300},
+                {"threshold minus 1", 99, 300},
+                {"greater than threshold", 550, 300},
+                {"threshold multiple", 600, 300},
+                {"threshold multiple plus one", 101, 300},
+                {"exactly threshold", 100, 300},
+        };
+    }
+}
diff --git a/src/test/java/htsjdk/samtools/util/SortingCollectionTest.java b/src/test/java/htsjdk/samtools/util/SortingCollectionTest.java
index 29f012084b..c27a78b340 100644
--- a/src/test/java/htsjdk/samtools/util/SortingCollectionTest.java
+++ b/src/test/java/htsjdk/samtools/util/SortingCollectionTest.java
@@ -26,9 +26,7 @@
 import htsjdk.HtsjdkTest;
 import org.testng.Assert;
 import org.testng.annotations.AfterMethod;
-import org.testng.annotations.AfterTest;
 import org.testng.annotations.BeforeMethod;
-import org.testng.annotations.BeforeTest;
 import org.testng.annotations.DataProvider;
 import org.testng.annotations.Test;
 
@@ -47,7 +45,7 @@ public class SortingCollectionTest extends HtsjdkTest {
     protected File tmpDir() {
         return new File(System.getProperty("java.io.tmpdir") + "/" + System.getProperty("user.name"), getClass().getSimpleName());
     }
-    
+
     @BeforeMethod void setup() { resetTmpDir(); }
     @AfterMethod void tearDown() { resetTmpDir(); }