diff --git a/client/src/components/Workflow/Run/WorkflowRun.vue b/client/src/components/Workflow/Run/WorkflowRun.vue
index 18a9389654eb..dea37e56adc0 100644
--- a/client/src/components/Workflow/Run/WorkflowRun.vue
+++ b/client/src/components/Workflow/Run/WorkflowRun.vue
@@ -195,7 +195,12 @@ defineExpose({
                     <span>before running this workflow.</span>
                 </BAlert>
                 <div v-else>
-                    <BAlert v-if="submissionError" class="mb-4" variant="danger" show>
+                    <BAlert
+                        v-if="submissionError"
+                        class="mb-4"
+                        variant="danger"
+                        data-description="workflow run error"
+                        show>
                         Workflow submission failed: {{ submissionError }}
                     </BAlert>
                     <WorkflowRunFormSimple
diff --git a/client/src/utils/navigation/navigation.yml b/client/src/utils/navigation/navigation.yml
index dc4fcaeaa0cb..904bcc824b36 100644
--- a/client/src/utils/navigation/navigation.yml
+++ b/client/src/utils/navigation/navigation.yml
@@ -568,6 +568,7 @@ tool_form:
     parameter_div: 'div.ui-form-element[id="form-element-${parameter}"]'
     parameter_error: 'div.ui-form-element[id="form-element-${parameter}"] .ui-form-error-text'
     parameter_checkbox: 'div.ui-form-element[id="form-element-${parameter}"] .ui-switch'
+    parameter_select: 'div.ui-form-element[id="form-element-${parameter}"] .multiselect'
     parameter_input: 'div.ui-form-element[id="form-element-${parameter}"] .ui-input'
     parameter_textarea: 'div.ui-form-element[id="form-element-${parameter}"] textarea'
     parameter_data_input_single: 'div.ui-form-element[id="form-element-${parameter}"] button[title="Single dataset"]'
@@ -674,6 +675,7 @@ trs_import:
 workflow_run:
   selectors:
     warning: '[data-description="workflow run warning"]'
+    run_error: '[data-description="workflow run error"]'
     input_div: "[step-label='${label}']"
     input_data_div: "[step-label='${label}'] .multiselect"
     # TODO: put step labels in the DOM ideally
diff --git a/lib/galaxy/selenium/navigates_galaxy.py b/lib/galaxy/selenium/navigates_galaxy.py
index 7a1c2aab576c..d5d66e5db7e3 100644
--- a/lib/galaxy/selenium/navigates_galaxy.py
+++ b/lib/galaxy/selenium/navigates_galaxy.py
@@ -1203,6 +1203,19 @@ def rule_builder_enter_source_text(self, json):
         text_area_elem.clear()
         text_area_elem.send_keys(json)
 
+    def workflow_editor_add_input(self, item_name="data_input"):
+        editor = self.components.workflow_editor
+
+        # Make sure we're on the workflow editor and not clicking the main tool panel.
+        editor.canvas_body.wait_for_visible()
+
+        editor.tool_menu.wait_for_visible()
+        editor.tool_menu_section_link(section_name="inputs").wait_for_and_click()
+        editor.tool_menu_item_link(item_name=item_name).wait_for_and_click()
+
+    def workflow_editor_add_parameter_input(self):
+        self.workflow_editor_add_input(item_name="parameter_input")
+
     def workflow_editor_set_license(self, license: str) -> None:
         license_selector = self.components.workflow_editor.license_selector
         license_selector.wait_for_and_click()
@@ -1618,7 +1631,9 @@ def workflow_run_ensure_expanded(self):
             workflow_run.expand_form_link.wait_for_and_click()
             workflow_run.expanded_form.wait_for_visible()
 
-    def workflow_create_new(self, annotation=None, clear_placeholder=False, save_workflow=True):
+    def workflow_create_new(
+        self, annotation: Optional[str] = None, clear_placeholder: bool = False, save_workflow: bool = True
+    ):
         self.workflow_index_open()
         self.sleep_for(self.wait_types.UX_RENDER)
         self.click_button_new_workflow()
diff --git a/lib/galaxy_test/selenium/test_workflow_editor.py b/lib/galaxy_test/selenium/test_workflow_editor.py
index af8ba29fbc53..cbd3c5f0f31b 100644
--- a/lib/galaxy_test/selenium/test_workflow_editor.py
+++ b/lib/galaxy_test/selenium/test_workflow_editor.py
@@ -69,7 +69,7 @@ def test_basics(self):
     def test_edit_annotation(self):
         editor = self.components.workflow_editor
         annotation = "new_annotation_test"
-        name = self.workflow_create_new(annotation=annotation)
+        name = self.create_and_wait_for_new_workflow_in_editor(annotation=annotation)
         edit_annotation = self.components.workflow_editor.edit_annotation
         self.assert_wf_annotation_is(annotation)
 
@@ -83,9 +83,7 @@ def test_edit_annotation(self):
 
     @selenium_test
     def test_edit_name(self):
-        editor = self.components.workflow_editor
-        name = self.workflow_create_new()
-        editor.canvas_body.wait_for_visible()
+        name = self.create_and_wait_for_new_workflow_in_editor()
         new_name = self._get_random_name()
         edit_name = self.components.workflow_editor.edit_name
         edit_name.wait_for_and_send_keys(new_name)
@@ -97,8 +95,7 @@ def test_edit_name(self):
     @selenium_test
     def test_edit_license(self):
         editor = self.components.workflow_editor
-        name = self.workflow_create_new()
-        editor.canvas_body.wait_for_visible()
+        name = self.create_and_wait_for_new_workflow_in_editor()
         editor.license_selector.wait_for_visible()
         assert "Do not specify" in editor.license_current_value.wait_for_text()
 
@@ -109,6 +106,87 @@ def test_edit_license(self):
         editor.license_selector.wait_for_visible()
         assert "MIT" in editor.license_current_value.wait_for_text()
 
+    @selenium_test
+    def test_parameter_regex_validation(self):
+        editor = self.components.workflow_editor
+        workflow_run = self.components.workflow_run
+
+        parameter_name = "text_param"
+        name = self.create_and_wait_for_new_workflow_in_editor()
+        self.workflow_editor_add_parameter_input()
+        editor.label_input.wait_for_and_send_keys(parameter_name)
+        # this really should be parameterized with the repeat name
+        self.components.tool_form.repeat_insert.wait_for_and_click()
+        self.components.tool_form.parameter_input(
+            parameter="parameter_definition|validators_0|regex_match"
+        ).wait_for_and_send_keys("moocow.*")
+        self.components.tool_form.parameter_input(
+            parameter="parameter_definition|validators_0|regex_doc"
+        ).wait_for_and_send_keys("input must start with moocow")
+        self.save_after_node_form_changes()
+
+        self.workflow_run_with_name(name)
+        self.sleep_for(self.wait_types.UX_TRANSITION)
+        input_element = workflow_run.simplified_input(label=parameter_name).wait_for_and_click()
+        input_element.send_keys("startswrong")
+        workflow_run.run_workflow_disabled.wait_for_absent()
+        workflow_run.run_error.assert_absent_or_hidden()
+        self.workflow_run_submit()
+        element = workflow_run.run_error.wait_for_present()
+        assert "input must start with moocow" in element.text
+
+    @selenium_test
+    def test_int_parameter_minimum_validation(self):
+        editor = self.components.workflow_editor
+        workflow_run = self.components.workflow_run
+
+        parameter_name = "int_param"
+        name = self.create_and_wait_for_new_workflow_in_editor()
+        self.workflow_editor_add_parameter_input()
+        editor.label_input.wait_for_and_send_keys(parameter_name)
+        select_field = self.components.tool_form.parameter_select(parameter="parameter_definition|parameter_type")
+        self.select_set_value(select_field, "integer")
+        self.components.tool_form.parameter_input(parameter="parameter_definition|min").wait_for_and_send_keys("4")
+        self.save_after_node_form_changes()
+
+        self.workflow_run_with_name(name)
+        self.sleep_for(self.wait_types.UX_TRANSITION)
+        input_element = workflow_run.simplified_input(label=parameter_name).wait_for_and_click()
+        input_element.send_keys("3")
+        workflow_run.run_workflow_disabled.wait_for_absent()
+        workflow_run.run_error.assert_absent_or_hidden()
+        self.workflow_run_submit()
+        element = workflow_run.run_error.wait_for_present()
+        # follow up with a bigger PR to just make this (4 <= value) right? need to set default message
+        # in parameter validators
+        assert "Value ('3') must fulfill (4 <= value <= +infinity)" in element.text, element.text
+
+    @selenium_test
+    def test_float_parameter_maximum_validation(self):
+        editor = self.components.workflow_editor
+        workflow_run = self.components.workflow_run
+
+        parameter_name = "float_param"
+        name = self.create_and_wait_for_new_workflow_in_editor()
+        self.workflow_editor_add_parameter_input()
+        editor.label_input.wait_for_and_send_keys(parameter_name)
+        select_field = self.components.tool_form.parameter_select(parameter="parameter_definition|parameter_type")
+        self.select_set_value(select_field, "float")
+        self.components.tool_form.parameter_input(parameter="parameter_definition|max").wait_for_and_send_keys("3.14")
+        self.save_after_node_form_changes()
+
+        self.workflow_run_with_name(name)
+        self.sleep_for(self.wait_types.UX_TRANSITION)
+        input_element = workflow_run.simplified_input(label=parameter_name).wait_for_and_click()
+        input_element.send_keys("3.2")
+        workflow_run.run_workflow_disabled.wait_for_absent()
+        workflow_run.run_error.assert_absent_or_hidden()
+        self.workflow_run_submit()
+        element = workflow_run.run_error.wait_for_present()
+        # see message in test test_int_parameter_minimum_validation about making this a little more human
+        # friendly.
+        assert "Value ('3.2') must fulfill (-infinity <= value <= 3.14)" in element.text, element.text
+
     @selenium_test
     def test_optional_select_data_field(self):
         editor = self.components.workflow_editor
@@ -120,9 +198,7 @@ def test_optional_select_data_field(self):
         node.title.wait_for_and_click()
         self.components.tool_form.parameter_checkbox(parameter="select_single").wait_for_and_click()
         self.components.tool_form.parameter_input(parameter="select_single").wait_for_and_send_keys("parameter value")
-        # onSetData does an extra POST to build_modules, so we need to wait for that ...
-        self.sleep_for(self.wait_types.UX_RENDER)
-        self.assert_workflow_has_changes_and_save()
+        self.save_after_node_form_changes()
         workflow = self.workflow_populator.download_workflow(workflow_id)
         tool_state = json.loads(workflow["steps"]["0"]["tool_state"])
         assert tool_state["select_single"] == "parameter value"
@@ -1329,6 +1405,17 @@ def test_editor_selection(self):
 
         assert editor.tool_bar.selection_count.wait_for_visible().text.find("1 comment") != -1
 
+    def create_and_wait_for_new_workflow_in_editor(self, annotation: Optional[str] = None) -> str:
+        editor = self.components.workflow_editor
+        name = self.workflow_create_new(annotation=annotation)
+        editor.canvas_body.wait_for_visible()
+        return name
+
+    def save_after_node_form_changes(self):
+        # onSetData does an extra POST to build_modules, so we need to wait for that ...
+        self.sleep_for(self.wait_types.UX_RENDER)
+        self.assert_workflow_has_changes_and_save()
+
     def get_node_position(self, label: str):
         node = self.components.workflow_editor.node._(label=label).wait_for_present()
 
@@ -1442,16 +1529,6 @@ def workflow_editor_source_sink_terminal_ids(self, source, sink):
 
         return source_id, sink_id
 
-    def workflow_editor_add_input(self, item_name="data_input"):
-        editor = self.components.workflow_editor
-
-        # Make sure we're on the workflow editor and not clicking the main tool panel.
-        editor.canvas_body.wait_for_visible()
-
-        editor.tool_menu.wait_for_visible()
-        editor.tool_menu_section_link(section_name="inputs").wait_for_and_click()
-        editor.tool_menu_item_link(item_name=item_name).wait_for_and_click()
-
     def workflow_editor_destroy_connection(self, sink):
         editor = self.components.workflow_editor