diff --git a/test/unit/tool_util/test_parsing.py b/test/unit/tool_util/test_parsing.py
index b6845c91caa..5d806b45ee4 100644
--- a/test/unit/tool_util/test_parsing.py
+++ b/test/unit/tool_util/test_parsing.py
@@ -11,7 +11,7 @@ from galaxy.util import galaxy_directory
 
 
 TOOL_XML_1 = """
-<tool name="BWA Mapper" id="bwa" version="1.0.1" is_multi_byte="true" display_interface="true" require_login="true" hidden="true">
+<tool name="BWA Mapper" id="bwa" version="1.0.1" display_interface="true" require_login="true" hidden="true">
     <description>The BWA Mapper</description>
     <xrefs>
         <xref type="bio.tools">bwa</xref>
@@ -266,9 +266,6 @@ class XmlLoaderTestCase(BaseLoaderTestCase):
     def test_name(self):
         assert self._tool_source.parse_name() == "BWA Mapper"
 
-    def test_is_multi_byte(self):
-        assert self._tool_source.parse_is_multi_byte()
-
     def test_display_interface(self):
         assert self._tool_source.parse_display_interface(False)
 
@@ -429,9 +426,6 @@ class YamlLoaderTestCase(BaseLoaderTestCase):
     def test_name(self):
         assert self._tool_source.parse_name() == "Bowtie Mapper"
 
-    def test_is_multi_byte(self):
-        assert not self._tool_source.parse_is_multi_byte()
-
     def test_display_interface(self):
         assert not self._tool_source.parse_display_interface(False)
         assert self._tool_source.parse_display_interface(True)
@@ -665,9 +659,6 @@ class SpecialToolLoaderTestCase(BaseLoaderTestCase):
         assert tool_module[1] == "ExportHistoryTool"
         assert self._tool_source.parse_tool_type() == "export_history"
 
-    def test_is_multi_byte(self):
-        assert not self._tool_source.parse_is_multi_byte()
-
     def test_version_command(self):
         assert self._tool_source.parse_version_command() is None
         assert self._tool_source.parse_version_command_interpreter() is None
diff --git a/test/unit/tool_util/test_tool_linters.py b/test/unit/tool_util/test_tool_linters.py
index 6b4a7995edb..8738b49f073 100644
--- a/test/unit/tool_util/test_tool_linters.py
+++ b/test/unit/tool_util/test_tool_linters.py
@@ -13,7 +13,7 @@ from galaxy.tool_util.parser.xml import XmlToolSource
 from galaxy.util import etree
 
 WHITESPACE_IN_VERSIONS_AND_NAMES = """
-<tool name=" BWA Mapper " id="bwa tool" version=" 1.0.1 " is_multi_byte="true" display_interface="true" require_login="true" hidden="true">
+<tool name=" BWA Mapper " id="bwa tool" version=" 1.0.1 " display_interface="true" require_login="true" hidden="true">
     <description>The BWA Mapper</description>
     <requirements>
         <requirement type="package" version=" 1.2.5 "> bwa </requirement>
@@ -30,7 +30,7 @@ WHITESPACE_IN_VERSIONS_AND_NAMES = """
 """
 
 REQUIREMENT_WO_VERSION = """
-<tool name="BWA Mapper" id="bwa_tool" version="1.0.1" is_multi_byte="true" display_interface="true" require_login="true" hidden="true">
+<tool name="BWA Mapper" id="bwa_tool" version="1.0.1" display_interface="true" require_login="true" hidden="true">
     <description>The BWA Mapper</description>
     <requirements>
         <requirement type="package">bwa</requirement>
@@ -48,14 +48,14 @@ REQUIREMENT_WO_VERSION = """
 """
 
 NO_SECTIONS_XML = """
-<tool name="BWA Mapper" id="bwa" version="1.0.1" is_multi_byte="true" display_interface="true" require_login="true" hidden="true">
+<tool name="BWA Mapper" id="bwa" version="1.0.1" display_interface="true" require_login="true" hidden="true">
     <description>The BWA Mapper</description>
     <version_command interpreter="python">bwa.py --version</version_command>
 </tool>
 """
 
 NO_WHEN_IN_CONDITIONAL_XML = """
-<tool name="BWA Mapper" id="bwa" version="1.0.1" is_multi_byte="true" display_interface="true" require_login="true" hidden="true">
+<tool name="BWA Mapper" id="bwa" version="1.0.1" display_interface="true" require_login="true" hidden="true">
     <description>The BWA Mapper</description>
     <version_command interpreter="python">bwa.py --version</version_command>
     <inputs>
@@ -100,7 +100,7 @@ SELECT_DUPLICATED_OPTIONS = """
 """
 
 SELECT_DEPRECATIONS = """
-<tool name="BWA Mapper" id="bwa" version="1.0.1" is_multi_byte="true" display_interface="true" require_login="true" hidden="true">
+<tool name="BWA Mapper" id="bwa" version="1.0.1" display_interface="true" require_login="true" hidden="true">
     <description>The BWA Mapper</description>
     <version_command interpreter="python">bwa.py --version</version_command>
     <inputs>
@@ -139,7 +139,7 @@ SELECT_OPTION_DEFINITIONS = """
 """
 
 VALIDATOR_INCOMPATIBILITIES = """
-<tool name="BWA Mapper" id="bwa" version="1.0.1" is_multi_byte="true" display_interface="true" require_login="true" hidden="true">
+<tool name="BWA Mapper" id="bwa" version="1.0.1" display_interface="true" require_login="true" hidden="true">
     <description>The BWA Mapper</description>
     <version_command interpreter="python">bwa.py --version</version_command>
     <inputs>
@@ -152,7 +152,7 @@ VALIDATOR_INCOMPATIBILITIES = """
 """
 
 VALIDATOR_CORRECT = """
-<tool name="BWA Mapper" id="bwa" version="1.0.1" is_multi_byte="true" display_interface="true" require_login="true" hidden="true">
+<tool name="BWA Mapper" id="bwa" version="1.0.1" display_interface="true" require_login="true" hidden="true">
     <description>The BWA Mapper</description>
     <version_command interpreter="python">bwa.py --version</version_command>
     <inputs>
@@ -199,7 +199,7 @@ VALIDATOR_CORRECT = """
 # check that linter accepts format source for collection elements as means to specify format
 # and that the linter warns if format and format_source are used
 OUTPUTS_COLLECTION_FORMAT_SOURCE = """
-<tool name="BWA Mapper" id="bwa" version="1.0.1" is_multi_byte="true" display_interface="true" require_login="true" hidden="true">
+<tool name="BWA Mapper" id="bwa" version="1.0.1" display_interface="true" require_login="true" hidden="true">
     <description>The BWA Mapper</description>
     <version_command interpreter="python">bwa.py --version</version_command>
     <outputs>
@@ -213,7 +213,7 @@ OUTPUTS_COLLECTION_FORMAT_SOURCE = """
 
 # check that linter does not complain about missing format if from_tool_provided_metadata is used
 OUTPUTS_DISCOVER_TOOL_PROVIDED_METADATA = """
-<tool name="BWA Mapper" id="bwa" version="1.0.1" is_multi_byte="true" display_interface="true" require_login="true" hidden="true">
+<tool name="BWA Mapper" id="bwa" version="1.0.1" display_interface="true" require_login="true" hidden="true">
     <description>The BWA Mapper</description>
     <version_command interpreter="python">bwa.py --version</version_command>
     <outputs>