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diff --git a/src/test/java/org/apache/commons/lang3/time/Java15BugFastDateParserTest.java b/src/test/java/org/apache/commons/lang3/time/Java15BugFastDateParserTest.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.lang3.time;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.Locale;
+import java.util.TimeZone;
+
+import org.apache.commons.lang3.AbstractLangTest;
+import org.apache.commons.lang3.function.TriFunction;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+/**
+ * These tests fail on Java 15 due to a bug which was only fixed for Java 16.
+ * <ul>
+ * <li>https://bugs.openjdk.java.net/browse/JDK-8248434</li>
+ * <li>https://bugs.openjdk.java.net/browse/JDK-8248655</li>
+ * </ul>
+ */
+public class Java15BugFastDateParserTest extends AbstractLangTest {
+
+    /** @see org.apache.commons.lang3.time.FastDateParserTest#dateParserParameters() */
+    private static final String DATE_PARSER_PARAMETERS = "org.apache.commons.lang3.time.FastDateParserTest#dateParserParameters()";
+
+    @Test
+    public void java15BuggyLocaleTest() throws ParseException {
+        final String buggyLocaleName = "ff_LR_#Adlm";
+        Locale buggyLocale = null;
+        for (final Locale locale : Locale.getAvailableLocales()) {
+            if (buggyLocaleName.equals(locale.toString())) {
+                buggyLocale = locale;
+                break;
+            }
+        }
+        if (buggyLocale == null) {
+            return;
+        }
+        testSingleLocale(buggyLocale);
+    }
+
+    @Test
+    public void java15BuggyLocaleTestAll() throws ParseException {
+        for (final Locale locale : Locale.getAvailableLocales()) {
+            testSingleLocale(locale);
+        }
+    }
+
+    private void testLocales(final TriFunction<String, TimeZone, Locale, DateParser> dbProvider, final String format,
+        final boolean eraBC) throws Exception {
+
+        final Calendar cal = Calendar.getInstance(TimeZones.GMT);
+        cal.clear();
+        cal.set(2003, Calendar.FEBRUARY, 10);
+        if (eraBC) {
+            cal.set(Calendar.ERA, GregorianCalendar.BC);
+        }
+
+        for (final Locale locale : Locale.getAvailableLocales()) {
+            // ja_JP_JP cannot handle dates before 1868 properly
+            if (eraBC && locale.equals(FastDateParser.JAPANESE_IMPERIAL)) {
+                continue;
+            }
+            final SimpleDateFormat sdf = new SimpleDateFormat(format, locale);
+            final DateParser fdf = dbProvider.apply(format, TimeZone.getDefault(), locale);
+
+            // If parsing fails, a ParseException will be thrown and the test will fail
+            FastDateParserTest.checkParse(locale, cal, sdf, fdf);
+        }
+    }
+
+    @ParameterizedTest
+    @MethodSource(DATE_PARSER_PARAMETERS)
+    public void testLocales_Long_AD(final TriFunction<String, TimeZone, Locale, DateParser> dpProvider)
+        throws Exception {
+        testLocales(dpProvider, FastDateParserTest.LONG_FORMAT, false);
+    }
+
+    @ParameterizedTest
+    @MethodSource(DATE_PARSER_PARAMETERS)
+    public void testLocales_Long_BC(final TriFunction<String, TimeZone, Locale, DateParser> dpProvider)
+        throws Exception {
+        testLocales(dpProvider, FastDateParserTest.LONG_FORMAT, true);
+    }
+
+    @ParameterizedTest
+    @MethodSource(DATE_PARSER_PARAMETERS)
+    public void testLocales_LongNoEra_AD(final TriFunction<String, TimeZone, Locale, DateParser> dpProvider)
+        throws Exception {
+        testLocales(dpProvider, FastDateParserTest.LONG_FORMAT_NOERA, false);
+    }
+
+    @ParameterizedTest
+    @MethodSource(DATE_PARSER_PARAMETERS)
+    public void testLocales_LongNoEra_BC(final TriFunction<String, TimeZone, Locale, DateParser> dpProvider)
+        throws Exception {
+        testLocales(dpProvider, FastDateParserTest.LONG_FORMAT_NOERA, true);
+    }
+
+    @ParameterizedTest
+    @MethodSource(DATE_PARSER_PARAMETERS)
+    public void testLocales_Short_AD(final TriFunction<String, TimeZone, Locale, DateParser> dpProvider)
+        throws Exception {
+        testLocales(dpProvider, FastDateParserTest.SHORT_FORMAT, false);
+    }
+
+    @ParameterizedTest
+    @MethodSource(DATE_PARSER_PARAMETERS)
+    public void testLocales_Short_BC(final TriFunction<String, TimeZone, Locale, DateParser> dpProvider)
+        throws Exception {
+        testLocales(dpProvider, FastDateParserTest.SHORT_FORMAT, true);
+    }
+
+    @ParameterizedTest
+    @MethodSource(DATE_PARSER_PARAMETERS)
+    public void testLocales_ShortNoEra_AD(final TriFunction<String, TimeZone, Locale, DateParser> dpProvider)
+        throws Exception {
+        testLocales(dpProvider, FastDateParserTest.SHORT_FORMAT_NOERA, false);
+    }
+
+    @ParameterizedTest
+    @MethodSource(DATE_PARSER_PARAMETERS)
+    public void testLocales_ShortNoEra_BC(final TriFunction<String, TimeZone, Locale, DateParser> dpProvider)
+        throws Exception {
+        testLocales(dpProvider, FastDateParserTest.SHORT_FORMAT_NOERA, true);
+    }
+
+    private void testSingleLocale(final Locale locale) throws ParseException {
+        final Calendar cal = Calendar.getInstance(TimeZones.GMT);
+        cal.clear();
+        cal.set(2003, Calendar.FEBRUARY, 10);
+        final SimpleDateFormat sdf = new SimpleDateFormat(FastDateParserTest.LONG_FORMAT, locale);
+        final String formattedDate = sdf.format(cal.getTime());
+        sdf.parse(formattedDate);
+        sdf.parse(formattedDate.toUpperCase(locale));
+        sdf.parse(formattedDate.toLowerCase(locale));
+    }
+
+}