diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/normalizer/TestSimpleRegionNormalizer.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/normalizer/TestSimpleRegionNormalizer.java
index df4638c44830..9c0350fa490b 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/normalizer/TestSimpleRegionNormalizer.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/normalizer/TestSimpleRegionNormalizer.java
@@ -34,6 +34,7 @@
 import static org.hamcrest.Matchers.not;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.RETURNS_DEEP_STUBS;
@@ -371,28 +372,7 @@ public void testHonorsMergeEnabledInTD() {
 
   @Test
   public void testHonorsMinimumRegionCount() {
-    conf.setInt(MERGE_MIN_REGION_COUNT_KEY, 1);
-    final TableName tableName = name.getTableName();
-    final List<RegionInfo> regionInfos = createRegionInfos(tableName, 3);
-    // create a table topology that results in both a merge plan and a split plan. Assert that the
-    // merge is only created when the when the number of table regions is above the region count
-    // threshold, and that the split plan is create in both cases.
-    final Map<byte[], Integer> regionSizes = createRegionSizesMap(regionInfos, 1, 1, 10);
-    setupMocksForNormalizer(regionSizes, regionInfos);
-
-    List<NormalizationPlan> plans = normalizer.computePlansForTable(tableDescriptor);
-    assertThat(plans, contains(
-      new SplitNormalizationPlan(regionInfos.get(2), 10),
-      new MergeNormalizationPlan.Builder()
-        .addTarget(regionInfos.get(0), 1)
-        .addTarget(regionInfos.get(1), 1)
-        .build()));
-
-    // have to call setupMocks again because we don't have dynamic config update on normalizer.
-    conf.setInt(MERGE_MIN_REGION_COUNT_KEY, 4);
-    setupMocksForNormalizer(regionSizes, regionInfos);
-    assertThat(normalizer.computePlansForTable(tableDescriptor), contains(
-      new SplitNormalizationPlan(regionInfos.get(2), 10)));
+    honorsMinimumRegionCount(MERGE_MIN_REGION_COUNT_KEY);
   }
 
   /**
@@ -400,7 +380,12 @@ public void testHonorsMinimumRegionCount() {
    */
   @Test
   public void testHonorsOldMinimumRegionCount() {
-    conf.setInt(MIN_REGION_COUNT_KEY, 1);
+    honorsMinimumRegionCount(MIN_REGION_COUNT_KEY);
+    assertNull(conf.get(MERGE_MIN_REGION_COUNT_KEY));
+  }
+
+  private void honorsMinimumRegionCount(String confKey) {
+    conf.setInt(confKey, 1);
     final TableName tableName = name.getTableName();
     final List<RegionInfo> regionInfos = createRegionInfos(tableName, 3);
     // create a table topology that results in both a merge plan and a split plan. Assert that the
@@ -418,7 +403,7 @@ public void testHonorsOldMinimumRegionCount() {
         .build()));
 
     // have to call setupMocks again because we don't have dynamic config update on normalizer.
-    conf.setInt(MIN_REGION_COUNT_KEY, 4);
+    conf.setInt(confKey, 4);
     setupMocksForNormalizer(regionSizes, regionInfos);
     assertThat(normalizer.computePlansForTable(tableDescriptor), contains(
       new SplitNormalizationPlan(regionInfos.get(2), 10)));
@@ -426,26 +411,7 @@ public void testHonorsOldMinimumRegionCount() {
 
   @Test
   public void testHonorsMinimumRegionCountInTD() {
-    conf.setInt(MERGE_MIN_REGION_COUNT_KEY, 1);
-    final TableName tableName = name.getTableName();
-    final List<RegionInfo> regionInfos = createRegionInfos(tableName, 3);
-    // create a table topology that results in both a merge plan and a split plan. Assert that the
-    // merge is only created when the when the number of table regions is above the region count
-    // threshold, and that the split plan is create in both cases.
-    final Map<byte[], Integer> regionSizes = createRegionSizesMap(regionInfos, 1, 1, 10);
-    setupMocksForNormalizer(regionSizes, regionInfos);
-
-    List<NormalizationPlan> plans = normalizer.computePlansForTable(tableDescriptor);
-    assertThat(plans, contains(
-      new SplitNormalizationPlan(regionInfos.get(2), 10),
-      new MergeNormalizationPlan.Builder()
-        .addTarget(regionInfos.get(0), 1)
-        .addTarget(regionInfos.get(1), 1)
-        .build()));
-
-    when(tableDescriptor.getValue(MIN_REGION_COUNT_KEY)).thenReturn("4");
-    assertThat(normalizer.computePlansForTable(tableDescriptor), contains(
-      new SplitNormalizationPlan(regionInfos.get(2), 10)));
+    honorsOldMinimumRegionCountInTD(MERGE_MIN_REGION_COUNT_KEY);
   }
 
   /**
@@ -454,7 +420,11 @@ public void testHonorsMinimumRegionCountInTD() {
    */
   @Test
   public void testHonorsOldMinimumRegionCountInTD() {
-    conf.setInt(MIN_REGION_COUNT_KEY, 1);
+    honorsOldMinimumRegionCountInTD(MIN_REGION_COUNT_KEY);
+  }
+
+  private void honorsOldMinimumRegionCountInTD(String confKey) {
+    conf.setInt(confKey, 1);
     final TableName tableName = name.getTableName();
     final List<RegionInfo> regionInfos = createRegionInfos(tableName, 3);
     // create a table topology that results in both a merge plan and a split plan. Assert that the
@@ -471,7 +441,7 @@ public void testHonorsOldMinimumRegionCountInTD() {
         .addTarget(regionInfos.get(1), 1)
         .build()));
 
-    when(tableDescriptor.getValue(MIN_REGION_COUNT_KEY)).thenReturn("4");
+    when(tableDescriptor.getValue(confKey)).thenReturn("4");
     assertThat(normalizer.computePlansForTable(tableDescriptor), contains(
       new SplitNormalizationPlan(regionInfos.get(2), 10)));
   }