diff --git a/exercises/practice/flatten-array/.meta/tests.toml b/exercises/practice/flatten-array/.meta/tests.toml
index 99eea4950..6300219d7 100644
--- a/exercises/practice/flatten-array/.meta/tests.toml
+++ b/exercises/practice/flatten-array/.meta/tests.toml
@@ -1,10 +1,23 @@
-# This is an auto-generated file. Regular comments will be removed when this
-# file is regenerated. Regenerating will not touch any manually added keys,
-# so comments can be added in a "comment" key.
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[8c71dabd-da60-422d-a290-4a571471fb14]
+description = "empty"
 
 [d268b919-963c-442d-9f07-82b93f1b518c]
 description = "no nesting"
 
+[3f15bede-c856-479e-bb71-1684b20c6a30]
+description = "flattens a nested array"
+
 [c84440cc-bb3a-48a6-862c-94cf23f2815d]
 description = "flattens array with just integers present"
 
@@ -14,6 +27,15 @@ description = "5 level nesting"
 [d572bdba-c127-43ed-bdcd-6222ac83d9f7]
 description = "6 level nesting"
 
+[0705a8e5-dc86-4cec-8909-150c5e54fa9c]
+description = "null values are omitted from the final result"
+
+[c6cf26de-8ccd-4410-84bd-b9efd88fd2bc]
+description = "consecutive null values at the front of the list are omitted from the final result"
+
+[382c5242-587e-4577-b8ce-a5fb51e385a1]
+description = "consecutive null values in the middle of the list are omitted from the final result"
+
 [ef1d4790-1b1e-4939-a179-51ace0829dbd]
 description = "6 level nest list with null values"
 
diff --git a/exercises/practice/flatten-array/.meta/version b/exercises/practice/flatten-array/.meta/version
deleted file mode 100644
index 26aaba0e8..000000000
--- a/exercises/practice/flatten-array/.meta/version
+++ /dev/null
@@ -1 +0,0 @@
-1.2.0
diff --git a/exercises/practice/flatten-array/src/test/java/FlattenerTest.java b/exercises/practice/flatten-array/src/test/java/FlattenerTest.java
index 2516c2c02..c7a77b816 100644
--- a/exercises/practice/flatten-array/src/test/java/FlattenerTest.java
+++ b/exercises/practice/flatten-array/src/test/java/FlattenerTest.java
@@ -3,6 +3,7 @@
 import org.junit.Test;
 
 import static java.util.Arrays.asList;
+import static java.util.Collections.emptyList;
 import static java.util.Collections.singletonList;
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -15,65 +16,105 @@ public void setUp() {
         flattener = new Flattener();
     }
 
+    @Test
+    public void testEmpty() {
+        assertThat(flattener.flatten(emptyList()))
+                .isEmpty();
+    }
+
+    @Ignore("Remove to run test")
     @Test
     public void testFlatListIsPreserved() {
         assertThat(flattener.flatten(asList(0, '1', "two")))
-            .containsExactly(0, '1', "two");
+                .containsExactly(0, '1', "two");
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void testNestedList() {
+        assertThat(flattener.flatten(singletonList(emptyList())))
+                .isEmpty();
     }
 
     @Ignore("Remove to run test")
     @Test
     public void testASingleLevelOfNestingWithNoNulls() {
         assertThat(flattener.flatten(asList(1, asList('2', 3, 4, 5, "six", "7"), 8)))
-            .containsExactly(1, '2', 3, 4, 5, "six", "7", 8);
+                .containsExactly(1, '2', 3, 4, 5, "six", "7", 8);
     }
 
     @Ignore("Remove to run test")
     @Test
     public void testFiveLevelsOfNestingWithNoNulls() {
-        assertThat(flattener.flatten(asList(0,
-                              '2', 
-                              asList(asList(2, "three"), 
-                                     '8', 
-                                     100, 
-                                     "four",
-                                     singletonList(singletonList(singletonList(50)))), "-2")))
-            .containsExactly(0, '2', 2, "three", '8', 100, "four", 50, "-2");
+        assertThat(flattener.flatten(
+                asList(0,
+                        '2',
+                        asList(asList(2, "three"),
+                                '8',
+                                100,
+                                "four",
+                                singletonList(singletonList(singletonList(50)))), "-2")))
+                .containsExactly(0, '2', 2, "three", '8', 100, "four", 50, "-2");
     }
 
     @Ignore("Remove to run test")
     @Test
     public void testSixLevelsOfNestingWithNoNulls() {
-        assertThat(flattener.flatten(asList("one",
-                                     asList('2',
-                                            singletonList(singletonList(3)),
-                                                          asList('4',
-                                                                 singletonList(singletonList(5))), "six", 7), "8")))
-            .containsExactly("one", '2', 3, '4', 5, "six", 7, "8");
+        assertThat(flattener.flatten(
+                asList("one",
+                        asList('2',
+                                singletonList(singletonList(3)),
+                                asList('4',
+                                        singletonList(singletonList(5))), "six", 7), "8")))
+                .containsExactly("one", '2', 3, '4', 5, "six", 7, "8");
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void testNullValuesAreOmitted() {
+        assertThat(flattener.flatten(asList("1", "two", null)))
+                .containsExactly("1", "two");
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void testConsecutiveNullValuesAtFrontOfListAreOmitted() {
+        assertThat(flattener.flatten(asList(null, null, 3)))
+                .containsExactly(3);
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void testConsecutiveNullValuesInMiddleOfListAreOmitted() {
+        assertThat(flattener.flatten(asList(1, null, null, "4")))
+                .containsExactly(1, "4");
     }
 
     @Ignore("Remove to run test")
     @Test
     public void testSixLevelsOfNestingWithNulls() {
-        assertThat(flattener.flatten(asList("0",
-                                     2,
-                                     asList(asList("two", '3'),
-                                            "8",
-                                            singletonList(singletonList("one hundred")),
-                                            null,
-                                            singletonList(singletonList(null))),
-                                                          "negative two")))
-            .containsExactly("0", 2, "two", '3', "8", "one hundred", "negative two");
+        assertThat(flattener.flatten(
+                asList("0",
+                        2,
+                        asList(asList("two", '3'),
+                                "8",
+                                singletonList(singletonList("one hundred")),
+                                null,
+                                singletonList(singletonList(null))),
+                        "negative two")))
+                .containsExactly("0", 2, "two", '3', "8", "one hundred", "negative two");
     }
 
     @Ignore("Remove to run test")
     @Test
     public void testNestedListsFullOfNullsOnly() {
-        assertThat(flattener.flatten(asList(null,
-                                              singletonList(singletonList(singletonList(null))),
-                                                            null,
-                                                            null,
-                                                            asList(asList(null, null), null), null))).isEmpty();
+        assertThat(flattener.flatten(
+                asList(null,
+                        singletonList(singletonList(singletonList(null))),
+                        null,
+                        null,
+                        asList(asList(null, null), null), null)))
+                .isEmpty();
     }
 
 }