diff --git a/.circleci/unittest/linux/scripts/install.sh b/.circleci/unittest/linux/scripts/install.sh
index de84d69a62..f92d7a3074 100755
--- a/.circleci/unittest/linux/scripts/install.sh
+++ b/.circleci/unittest/linux/scripts/install.sh
@@ -56,7 +56,7 @@ fi
 (
     set -x
     conda install -y -c conda-forge ${NUMBA_DEV_CHANNEL} 'librosa>=0.8.0' parameterized 'requests>=2.20'
-    pip install kaldi-io SoundFile coverage pytest pytest-cov scipy transformers expecttest
+    pip install kaldi-io SoundFile coverage pytest pytest-cov scipy transformers expecttest unidecode inflect
 )
 # Install fairseq
 git clone https://github.com/pytorch/fairseq
diff --git a/.circleci/unittest/windows/scripts/install.sh b/.circleci/unittest/windows/scripts/install.sh
index f9cb8a4142..3acf5c22d5 100644
--- a/.circleci/unittest/windows/scripts/install.sh
+++ b/.circleci/unittest/windows/scripts/install.sh
@@ -44,7 +44,7 @@ fi
 (
     set -x
     conda install -y -c conda-forge ${NUMBA_DEV_CHANNEL} 'librosa>=0.8.0' parameterized 'requests>=2.20'
-    pip install kaldi-io SoundFile coverage pytest pytest-cov scipy transformers expecttest
+    pip install kaldi-io SoundFile coverage pytest pytest-cov scipy transformers expecttest unidecode inflect
 )
 # Install fairseq
 git clone https://github.com/pytorch/fairseq
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 67ea6caed2..92a1b94f3a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -87,6 +87,8 @@ Optional packages to install if you want to run related tests:
 - `transformers`
 - `fairseq` (it has to be newer than `0.10.2`, so you will need to install from
   source. Commit `e6eddd80` is known to work.)
+- `unidecode` (dependency for testing text preprocessing functions for examples/pipeline_tacotron2)
+- `inflect` (dependency for testing text preprocessing functions for examples/pipeline_tacotron2)
 
 ## Development Process
 
diff --git a/examples/pipeline_tacotron2/text/numbers.py b/examples/pipeline_tacotron2/text/numbers.py
index 3a0b141dd0..d42e82e134 100644
--- a/examples/pipeline_tacotron2/text/numbers.py
+++ b/examples/pipeline_tacotron2/text/numbers.py
@@ -30,28 +30,36 @@
 
 _inflect = inflect.engine()
 _comma_number_re = re.compile(r'([0-9][0-9\,]+[0-9])')
-_decimal_number_re = re.compile(r'([0-9]+\.[0-9]+)')
 _pounds_re = re.compile(r'£([0-9\,]*[0-9]+)')
 _dollars_re = re.compile(r'\$([0-9\.\,]*[0-9]+)')
+_decimal_number_re = re.compile(r'([0-9]+\.[0-9]+)')
 _ordinal_re = re.compile(r'[0-9]+(st|nd|rd|th)')
 _number_re = re.compile(r'[0-9]+')
 
 
-def _remove_commas(m: re.Match) -> str:
-    return m.group(1).replace(',', '')
+def _remove_commas(text: str) -> str:
+    return re.sub(_comma_number_re, lambda m: m.group(1).replace(',', ''), text)
 
 
-def _expand_decimal_point(m: re.Match) -> str:
-    return m.group(1).replace('.', ' point ')
+def _expand_pounds(text: str) -> str:
+    return re.sub(_pounds_re, r'\1 pounds', text)
 
 
-def _expand_dollars(m: re.Match) -> str:
+def _expand_dollars_repl_fn(m):
+    """The replacement function for expanding dollars."""
     match = m.group(1)
     parts = match.split('.')
     if len(parts) > 2:
         return match + ' dollars'  # Unexpected format
     dollars = int(parts[0]) if parts[0] else 0
-    cents = int(parts[1]) if len(parts) > 1 and parts[1] else 0
+    if len(parts) > 1 and parts[1]:
+        if len(parts[1]) == 1:
+            # handle the case where we have one digit after the decimal point
+            cents = int(parts[1]) * 10
+        else:
+            cents = int(parts[1])
+    else:
+        cents = 0
     if dollars and cents:
         dollar_unit = 'dollar' if dollars == 1 else 'dollars'
         cent_unit = 'cent' if cents == 1 else 'cents'
@@ -66,11 +74,20 @@ def _expand_dollars(m: re.Match) -> str:
         return 'zero dollars'
 
 
-def _expand_ordinal(m: re.Match) -> str:
-    return _inflect.number_to_words(m.group(0))
+def _expand_dollars(text: str) -> str:
+    return re.sub(_dollars_re, _expand_dollars_repl_fn, text)
+
 
+def _expand_decimal_point(text: str) -> str:
+    return re.sub(_decimal_number_re, lambda m: m.group(1).replace('.', ' point '), text)
 
-def _expand_number(m: re.Match) -> str:
+
+def _expand_ordinal(text: str) -> str:
+    return re.sub(_ordinal_re, lambda m: _inflect.number_to_words(m.group(0)), text)
+
+
+def _expand_number_repl_fn(m):
+    """The replacement function for expanding number."""
     num = int(m.group(0))
     if num > 1000 and num < 3000:
         if num == 2000:
@@ -85,11 +102,15 @@ def _expand_number(m: re.Match) -> str:
         return _inflect.number_to_words(num, andword='')
 
 
+def _expand_number(text: str) -> str:
+    return re.sub(_number_re, _expand_number_repl_fn, text)
+
+
 def normalize_numbers(text: str) -> str:
-    text = re.sub(_comma_number_re, _remove_commas, text)
-    text = re.sub(_pounds_re, r'\1 pounds', text)
-    text = re.sub(_dollars_re, _expand_dollars, text)
-    text = re.sub(_decimal_number_re, _expand_decimal_point, text)
-    text = re.sub(_ordinal_re, _expand_ordinal, text)
-    text = re.sub(_number_re, _expand_number, text)
+    text = _remove_commas(text)
+    text = _expand_pounds(text)
+    text = _expand_dollars(text)
+    text = _expand_decimal_point(text)
+    text = _expand_ordinal(text)
+    text = _expand_number(text)
     return text
diff --git a/examples/pipeline_tacotron2/text/test_text.py b/examples/pipeline_tacotron2/text/test_text.py
deleted file mode 100644
index 61ff451668..0000000000
--- a/examples/pipeline_tacotron2/text/test_text.py
+++ /dev/null
@@ -1,22 +0,0 @@
-import unittest
-
-from parameterized import parameterized
-
-from .text_preprocessing import text_to_sequence
-
-
-class TestTextPreprocessor(unittest.TestCase):
-
-    @parameterized.expand(
-        [
-            ["dr.  Strange?", [15, 26, 14, 31, 26, 29, 11, 30, 31, 29, 12, 25, 18, 16, 10]],
-            ["ML, is        fun.", [24, 23, 6, 11, 20, 30, 11, 17, 32, 25, 7]],
-            ["I love torchaudio!", [20, 11, 23, 26, 33, 16, 11, 31, 26, 29, 14, 19, 12, 32, 15, 20, 26, 2]],
-            # 'one thousand dollars, twenty cents'
-            ["$1,000.20", [26, 25, 16, 11, 31, 19, 26, 32, 30, 12, 25, 15, 11, 15, 26, 23, 23,
-                           12, 29, 30, 6, 11, 31, 34, 16, 25, 31, 36, 11, 14, 16, 25, 31, 30]],
-        ]
-    )
-    def test_text_to_sequence(self, sent, seq):
-
-        assert (text_to_sequence(sent) == seq)
diff --git a/test/torchaudio_unittest/example/tacotron2/test_text_preprocessing.py b/test/torchaudio_unittest/example/tacotron2/test_text_preprocessing.py
new file mode 100644
index 0000000000..8da02de88e
--- /dev/null
+++ b/test/torchaudio_unittest/example/tacotron2/test_text_preprocessing.py
@@ -0,0 +1,97 @@
+from parameterized import parameterized
+
+from torchaudio._internal.module_utils import is_module_available
+from torchaudio_unittest.common_utils import TorchaudioTestCase, skipIfNoModule
+
+if is_module_available("unidecode") and is_module_available("inflect"):
+    from pipeline_tacotron2.text.text_preprocessing import text_to_sequence
+    from pipeline_tacotron2.text.numbers import (
+        _remove_commas,
+        _expand_pounds,
+        _expand_dollars,
+        _expand_decimal_point,
+        _expand_ordinal,
+        _expand_number,
+    )
+
+
+@skipIfNoModule("unidecode")
+@skipIfNoModule("inflect")
+class TestTextPreprocessor(TorchaudioTestCase):
+
+    @parameterized.expand(
+        [
+            ["dr.  Strange?", [15, 26, 14, 31, 26, 29, 11, 30, 31, 29, 12, 25, 18, 16, 10]],
+            ["ML, is        fun.", [24, 23, 6, 11, 20, 30, 11, 17, 32, 25, 7]],
+            ["I love torchaudio!", [20, 11, 23, 26, 33, 16, 11, 31, 26, 29, 14, 19, 12, 32, 15, 20, 26, 2]],
+            # 'one thousand dollars, twenty cents'
+            ["$1,000.20", [26, 25, 16, 11, 31, 19, 26, 32, 30, 12, 25, 15, 11, 15, 26, 23, 23,
+                           12, 29, 30, 6, 11, 31, 34, 16, 25, 31, 36, 11, 14, 16, 25, 31, 30]],
+        ]
+    )
+    def test_text_to_sequence(self, sent, seq):
+
+        assert (text_to_sequence(sent) == seq)
+
+    @parameterized.expand(
+        [
+            ["He, she, and I have $1,000", "He, she, and I have $1000"],
+        ]
+    )
+    def test_remove_commas(self, sent, truth):
+
+        assert (_remove_commas(sent) == truth)
+
+    @parameterized.expand(
+        [
+            ["He, she, and I have £1000", "He, she, and I have 1000 pounds"],
+        ]
+    )
+    def test_expand_pounds(self, sent, truth):
+
+        assert (_expand_pounds(sent) == truth)
+
+    @parameterized.expand(
+        [
+            ["He, she, and I have $1000", "He, she, and I have 1000 dollars"],
+            ["He, she, and I have $3000.01", "He, she, and I have 3000 dollars, 1 cent"],
+            ["He has $500.20 and she has $1000.50.",
+             "He has 500 dollars, 20 cents and she has 1000 dollars, 50 cents."],
+        ]
+    )
+    def test_expand_dollars(self, sent, truth):
+
+        assert (_expand_dollars(sent) == truth)
+
+    @parameterized.expand(
+        [
+            ["1000.20", "1000 point 20"],
+            ["1000.1", "1000 point 1"],
+        ]
+    )
+    def test_expand_decimal_point(self, sent, truth):
+
+        assert (_expand_decimal_point(sent) == truth)
+
+    @parameterized.expand(
+        [
+            ["21st centry", "twenty-first centry"],
+            ["20th centry", "twentieth centry"],
+            ["2nd place.", "second place."],
+        ]
+    )
+    def test_expand_ordinal(self, sent, truth):
+
+        assert (_expand_ordinal(sent) == truth)
+        _expand_ordinal,
+
+    @parameterized.expand(
+        [
+            ["100020 dollars.", "one hundred thousand twenty dollars."],
+            ["1234567890!", "one billion, two hundred thirty-four million, "
+                            "five hundred sixty-seven thousand, eight hundred ninety!"],
+        ]
+    )
+    def test_expand_number(self, sent, truth):
+
+        assert (_expand_number(sent) == truth)