diff --git a/lib/galaxy/datatypes/data.py b/lib/galaxy/datatypes/data.py
index 917e3a1e1b8..205b3ff7209 100644
--- a/lib/galaxy/datatypes/data.py
+++ b/lib/galaxy/datatypes/data.py
@@ -975,7 +975,7 @@ def get_file_peek( file_name, is_multi_byte=False, WIDTH=256, LINE_COUNT=5, skip
     data_checked = False
     temp = open( file_name, "U" )
     last_line = ''
-    while count <= LINE_COUNT:
+    while count < LINE_COUNT:
         line = last_line + temp.readline( WIDTH - len( last_line ) )
         if line and not is_multi_byte and not data_checked:
             # See if we have a compressed or binary file
@@ -993,7 +993,7 @@ def get_file_peek( file_name, is_multi_byte=False, WIDTH=256, LINE_COUNT=5, skip
         if not line_wrap:
             if '\n' in line:
                 i = line.index( '\n' )
-                last_line = line[i:]
+                last_line = line[i + 1:]
                 line = line[:i]
             else:
                 last_line = ''
diff --git a/test/unit/datatypes/test_data.py b/test/unit/datatypes/test_data.py
new file mode 100644
index 00000000000..5be94c88178
--- /dev/null
+++ b/test/unit/datatypes/test_data.py
@@ -0,0 +1,11 @@
+"""
+Unit tests for base DataTypes.
+.. seealso:: galaxy.datatypes.data
+"""
+
+from galaxy.datatypes.data import get_file_peek
+
+
+def test_get_file_peek( ):
+    # should get the first 5 lines of the file without a trailing newline character
+    assert get_file_peek('test-data/1.tabular', line_wrap=False) == 'chr22\t1000\tNM_17\nchr22\t2000\tNM_18\nchr10\t2200\tNM_10\nchr10\thap\ttest\nchr10\t1200\tNM_11'