diff --git a/reader_test.go b/reader_test.go
index aaa43b2..b9adeb4 100644
--- a/reader_test.go
+++ b/reader_test.go
@@ -42,6 +42,31 @@ func TestReader(t *testing.T) {
 	}
 }
 
+func TestReaderFromEmpty(t *testing.T) {
+	t.Parallel()
+
+	file, err := os.Open("testdata/em.lz")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	reader, err := lzip.NewReader(file)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var buf bytes.Buffer
+	if _, err := io.Copy(&buf, reader); err != nil {
+		t.Fatal(err)
+	}
+
+	data := []byte{}
+
+	if !bytes.Equal(buf.Bytes(), data) {
+		t.Error("unexpected mismatch between uncompressed data and test data")
+	}
+}
+
 func TestReaderInvalidMagic(t *testing.T) {
 	t.Parallel()
 
@@ -104,3 +129,16 @@ func TestReaderDictSizeTooSmall(t *testing.T) {
 		t.Errorf("expected too small dictionary size `%v`, got `%v`", expected, size)
 	}
 }
+
+func TestReaderNonZeroFirstByte(t *testing.T) {
+	t.Parallel()
+
+	file, err := os.Open("testdata/fox_nz.lz")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := lzip.NewReader(file); err == nil {
+		t.Error("unexpected success")
+	}
+}
diff --git a/testdata/README.adoc b/testdata/README.adoc
index 443eaa7..9254220 100644
--- a/testdata/README.adoc
+++ b/testdata/README.adoc
@@ -6,8 +6,8 @@
 :lzd-url: https://www.nongnu.org/lzip/lzd.html
 :lzd-download-url: https://download.savannah.gnu.org/releases/lzip/lzd
 
-Test data files imported those of {lzd-url}[lzd] version 1.4.
+Test data files imported those of {lzd-url}[lzd] version 1.5.
 
 .These can be obtained from either
-* {lzd-download-url}/lzd-1.4.tar.lz
-* {lzd-download-url}/lzd-1.4.tar.gz
+* {lzd-download-url}/lzd-1.5.tar.lz
+* {lzd-download-url}/lzd-1.5.tar.gz
diff --git a/testdata/em.lz b/testdata/em.lz
new file mode 100644
index 0000000..ec60725
Binary files /dev/null and b/testdata/em.lz differ
diff --git a/testdata/em.lz.license b/testdata/em.lz.license
new file mode 100644
index 0000000..a329729
--- /dev/null
+++ b/testdata/em.lz.license
@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2013 Antonio Diaz Diaz
+
+SPDX-License-Identifier: BSD-2-Clause
diff --git a/testdata/fox_nz.lz b/testdata/fox_nz.lz
new file mode 100644
index 0000000..44a4b58
Binary files /dev/null and b/testdata/fox_nz.lz differ
diff --git a/testdata/fox_nz.lz.license b/testdata/fox_nz.lz.license
new file mode 100644
index 0000000..a329729
--- /dev/null
+++ b/testdata/fox_nz.lz.license
@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2013 Antonio Diaz Diaz
+
+SPDX-License-Identifier: BSD-2-Clause
diff --git a/testdata/test.txt b/testdata/test.txt
index 9196a3a..423f0c0 100644
--- a/testdata/test.txt
+++ b/testdata/test.txt
@@ -1,8 +1,7 @@
                     GNU GENERAL PUBLIC LICENSE
                        Version 2, June 1991
 
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc. <http://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -339,8 +338,7 @@ Public License instead of this License.
                     GNU GENERAL PUBLIC LICENSE
                        Version 2, June 1991
 
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc. <http://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
diff --git a/testdata/test.txt.lz b/testdata/test.txt.lz
index 22cea6e..5dc169f 100644
Binary files a/testdata/test.txt.lz and b/testdata/test.txt.lz differ