diff --git a/lib/galaxy/tool_util/linters/tests.py b/lib/galaxy/tool_util/linters/tests.py
index 68767a92c97..9c6a68084cc 100644
--- a/lib/galaxy/tool_util/linters/tests.py
+++ b/lib/galaxy/tool_util/linters/tests.py
@@ -38,11 +38,16 @@ def lint_tests(tool_xml, lint_ctx):
             if len(assertions) == 0:
                 continue
             if len(assertions) > 1:
-                lint_ctx.error(f"Test {test_idx}: More than one {ta} found. Only the first is considered.")
+                lint_ctx.error(f"Test {test_idx}: More than one {ta} found. Only the first is considered.", node=test)
             has_test = True
             _check_asserts(test_idx, assertions, lint_ctx)
         _check_asserts(test_idx, test.findall(".//assert_contents"), lint_ctx)
 
+        # check if expect_num_outputs is set if there are outputs with filters
+        filter = tool_xml.findall("./outputs//filter")
+        if len(filter) > 0 and "expect_num_outputs" not in test.attrib:
+            lint_ctx.warn("Test should specify 'expect_num_outputs' if outputs have filters", node=test)
+
         # really simple test that test parameters are also present in the inputs
         for param in test.findall("param"):
             name = param.attrib.get("name", None)
diff --git a/test/unit/tool_util/test_tool_linters.py b/test/unit/tool_util/test_tool_linters.py
index eb2531de8cf..836168da1b5 100644
--- a/test/unit/tool_util/test_tool_linters.py
+++ b/test/unit/tool_util/test_tool_linters.py
@@ -749,6 +749,20 @@ TESTS_DISCOVER_OUTPUTS = """
 </tool>
 """
 
+TESTS_EXPECT_NUM_OUTPUTS_FILTER = """
+<tool>
+    <outputs>
+        <data>
+            <filter/>
+        </data>
+    </outputs>
+    <tests>
+        <test expect_failure="false">
+        </test>
+    </tests>
+</tool>
+"""
+
 # tool xml for xml_order linter
 XML_ORDER = """
 <tool>
@@ -1586,6 +1600,14 @@ def test_tests_discover_outputs(lint_ctx):
     assert len(lint_ctx.error_messages) == 4
 
 
+def test_tests_expect_num_outputs_filter(lint_ctx):
+    tool_source = get_xml_tool_source(TESTS_EXPECT_NUM_OUTPUTS_FILTER)
+    run_lint(lint_ctx, tests.lint_tsts, tool_source)
+    assert "Test should specify 'expect_num_outputs' if outputs have filters" in lint_ctx.warn_messages
+    assert len(lint_ctx.warn_messages) == 1
+    assert len(lint_ctx.error_messages) == 0
+
+
 def test_xml_order(lint_ctx):
     tool_source = get_xml_tool_source(XML_ORDER)
     run_lint(lint_ctx, xml_order.lint_xml_order, tool_source)