diff --git a/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicDateCheckFilterTest.java b/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicDateCheckFilterTest.java
index 965b42da0289..e4cabea77957 100644
--- a/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicDateCheckFilterTest.java
+++ b/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicDateCheckFilterTest.java
@@ -72,10 +72,10 @@ public void testGetDayOfWeek1() {
   @Test
   public void testGetDayOfWeek2() {
     Calendar calendar = Calendar.getInstance();
-    calendar.set(2022, 3 - 1, 25);
+    calendar.set(2022, Calendar.MARCH, 25);
     assertThat(filter.getDayOfWeek(calendar), is("الجمعة"));
-    calendar.set(2022, 3 - 1, 26);
 
+    calendar.set(2022, Calendar.MARCH, 26);
     assertThat(filter.getDayOfWeek(calendar), is("السبت"));
   }
 
diff --git a/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicMasdarToVerbFilterTest.java b/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicMasdarToVerbFilterTest.java
index 048c7e7852a5..81812728c5a5 100644
--- a/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicMasdarToVerbFilterTest.java
+++ b/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicMasdarToVerbFilterTest.java
@@ -23,12 +23,10 @@
 import org.languagetool.rules.FakeRule;
 import org.languagetool.rules.RuleMatch;
 import org.languagetool.rules.SimpleReplaceDataLoader;
-import org.languagetool.rules.ar.ArabicWordinessRule;
 import org.languagetool.rules.patterns.RuleFilter;
 import org.languagetool.tagging.ar.ArabicTagger;
 
 import java.io.IOException;
-import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -49,22 +47,23 @@ public class ArabicMasdarToVerbFilterTest {
 
   @Test
   public void testFilter() throws IOException {
-    assertSuggestion("عمل", "يعمل", false);
-    assertSuggestion("إعمال", "يعمل", false);
-    assertSuggestion("سؤال", "يسأل", false);
-    assertSuggestion("أكل", "يأكل", false);
+    assertSuggestion("عمل", "يعمل");
+    assertSuggestion("إعمال", "يعمل");
+    assertSuggestion("سؤال", "يسأل");
+    assertSuggestion("أكل", "يأكل");
   }
 
-  private void assertSuggestion(String word, String expectedSuggestion, boolean debug) throws IOException {
+  private void assertSuggestion(String word, String expectedSuggestion) throws IOException {
     String word1 = "يقوم";
     String word2 = "بال" + word;
     Map<String, String> args = new HashMap<>();
     args.put("verb", word1);
     args.put("noun", word2);
     List<AnalyzedTokenReadings> patternTokens = tagger.tag(asList(word1, word2));
-    AnalyzedTokenReadings[] patternTokensArray = patternTokens.stream().toArray(AnalyzedTokenReadings[]::new);
+    AnalyzedTokenReadings[] patternTokensArray = patternTokens.toArray(new AnalyzedTokenReadings[0]);
     RuleMatch ruleMatch = filter.acceptRuleMatch(match, args, -1, patternTokensArray);
 
+    assertThat(ruleMatch, notNullValue());
     assertThat(ruleMatch.getSuggestedReplacements().size(), is(1));
     assertThat(ruleMatch.getSuggestedReplacements().get(0), is(expectedSuggestion));
   }
diff --git a/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicNumberPhraseFilterTest.java b/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicNumberPhraseFilterTest.java
index 11953a95cd46..28a79f12ab52 100644
--- a/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicNumberPhraseFilterTest.java
+++ b/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicNumberPhraseFilterTest.java
@@ -35,6 +35,7 @@
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.core.IsNull.notNullValue;
 
 public class ArabicNumberPhraseFilterTest {
 
@@ -106,13 +107,15 @@ private void assertSuggestion(String phrase, String expectedSuggestion, String p
 
     List<AnalyzedTokenReadings> patternTokens = tagger.tag(tokens);
 
-    AnalyzedTokenReadings[] patternTokensArray = patternTokens.stream().toArray(AnalyzedTokenReadings[]::new);
+    AnalyzedTokenReadings[] patternTokensArray = patternTokens.toArray(new AnalyzedTokenReadings[0]);
     RuleMatch ruleMatch = filter.acceptRuleMatch(match, args, -1, patternTokensArray);
     if (!debug) {
       int expectedSize = expectedSuggestion.split("\\|").length;
+      assertThat(ruleMatch, notNullValue());
       assertThat(ruleMatch.getSuggestedReplacements().size(), is(expectedSize));
     } else { //  debug is true
       String suggestion = "";
+      assertThat(ruleMatch, notNullValue());
       if (!ruleMatch.getSuggestedReplacements().isEmpty()) {
         suggestion = ruleMatch.getSuggestedReplacements().toString();
       }
diff --git a/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicVerbToMasdarFilterTest.java b/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicVerbToMasdarFilterTest.java
index 318683ab5f5c..f291e80f8892 100644
--- a/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicVerbToMasdarFilterTest.java
+++ b/languagetool-language-modules/ar/src/test/java/org/languagetool/rules/ar/filters/ArabicVerbToMasdarFilterTest.java
@@ -34,7 +34,7 @@
 import java.util.Map;
 
 import static java.util.Arrays.asList;
-import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.*;
 import static org.hamcrest.MatcherAssert.assertThat;
 
 public class ArabicVerbToMasdarFilterTest {
@@ -42,44 +42,25 @@ public class ArabicVerbToMasdarFilterTest {
   private final RuleMatch match = new RuleMatch(new FakeRule(), null, 0, 10, "message");
   private final RuleFilter filter = new ArabicVerbToMafoulMutlaqFilter();
   private final ArabicTagger tagger = new ArabicTagger();
-  private static final String FILE_NAME = "/ar/arabic_verb_masdar.txt";
-  final boolean debug = false;
 
   @Test
   public void testFilter() throws IOException {
-    assertSuggestion("يعمل", "يعمل إعمالًا جيدًا|يعمل عملةً جيدةً|يعمل عملًا جيدًا", true);
+    assertSuggestion("يعمل", "يعمل عملًا جيدًا");
   }
 
-  private void assertSuggestion(String word, String expectedSuggestion, boolean debug) throws IOException {
+  private void assertSuggestion(String word, String expectedSuggestion) throws IOException {
     String word2 = "بأسلوب";
     String word3 = "جيد";
     Map<String, String> args = new HashMap<>();
     args.put("verb", word);
     args.put("adj", word3);
     List<AnalyzedTokenReadings> patternTokens = tagger.tag(asList(word, word2, word3));
-    AnalyzedTokenReadings[] patternTokensArray = patternTokens.stream().toArray(AnalyzedTokenReadings[]::new);
+    AnalyzedTokenReadings[] patternTokensArray = patternTokens.toArray(new AnalyzedTokenReadings[0]);
     RuleMatch ruleMatch = filter.acceptRuleMatch(match, args, -1, patternTokensArray);
-    if (!debug) {
-      assertThat(ruleMatch.getSuggestedReplacements().size(), is(3));
-      assertThat(ruleMatch.getSuggestedReplacements().get(0), is(expectedSuggestion));
-    } else { //  debug is true
-      String suggestion = "";
-      if (!ruleMatch.getSuggestedReplacements().isEmpty()) {
-        suggestion = ruleMatch.getSuggestedReplacements().toString();
-      }
-      // show only no suggestion cases
-      System.out.println("مثال: " + word + " " + word2 + " " + word3 + " مقترح:" + suggestion);
-    }
+    assertThat(ruleMatch, notNullValue());
+    assertThat(ruleMatch.getSuggestedReplacements(), hasItem(expectedSuggestion));
   }
 
-
-  @Test
-  public void testRule() throws IOException {
-    // errors:
-    Map<String, List<String>> verb2masdarList = loadFromPath(FILE_NAME);
-  }
-
-
   protected static Map<String, List<String>> loadFromPath(String path) {
     return new SimpleReplaceDataLoader().loadWords(path);
   }