diff --git a/client/galaxy/scripts/mvc/workflow/workflow-terminals.js b/client/galaxy/scripts/mvc/workflow/workflow-terminals.js
index 9791cf2ec50..fd90296d9af 100644
--- a/client/galaxy/scripts/mvc/workflow/workflow-terminals.js
+++ b/client/galaxy/scripts/mvc/workflow/workflow-terminals.js
@@ -157,14 +157,21 @@ var Terminal = Backbone.Model.extend({
         });
     },
     setMapOver: function(val) {
+        let output_val = val;
         if (this.multiple) {
-            return; // Cannot set this to be multirun...
+            // emulate list input
+            let description = new CollectionTypeDescription('list');
+            if (val.collectionType === description.collectionType) {
+                // No mapping over necessary
+                return;
+            }
+            output_val = val.effectiveMapOver ? val.effectiveMapOver(description): val;
         }
 
         if (!this.mapOver().equal(val)) {
             this.terminalMapping.setMapOver(val);
             _.each(this.node.output_terminals, outputTerminal => {
-                outputTerminal.setMapOver(val);
+                outputTerminal.setMapOver(output_val);
             });
         }
     },
@@ -407,11 +414,8 @@ var InputTerminal = BaseInputTerminal.extend({
                     // collection (yet...)
                     return false;
                 }
-                if (otherCollectionType.rank == 1) {
-                    return this._producesAcceptableDatatype(other);
-                } else {
-                    // TODO: Allow subcollection mapping over this as if it were
-                    // a list collection input.
+                if (otherCollectionType.collectionType.endsWith('paired')) {
+                    // shouldn't process pairs in multiple="true" input
                     return false;
                 }
             }
diff --git a/client/galaxy/scripts/mvc/workflow/workflow-view-terminals.js b/client/galaxy/scripts/mvc/workflow/workflow-view-terminals.js
index a43e1be25b5..2458de63f78 100644
--- a/client/galaxy/scripts/mvc/workflow/workflow-view-terminals.js
+++ b/client/galaxy/scripts/mvc/workflow/workflow-view-terminals.js
@@ -77,9 +77,7 @@ var BaseInputTerminalView = TerminalView.extend({
         const name = input.name;
         const id = `node-${node.cid}-input-${name}`;
         const terminal = this.terminalForInput(input);
-        if (!terminal.multiple) {
-            this.setupMappingView(terminal);
-        }
+        this.setupMappingView(terminal);
         this.el.terminal = terminal;
         this.$el.attr("input-name", name);
         this.$el.attr("id", id);
diff --git a/client/galaxy/scripts/qunit/tests/workflow_editor_tests.js b/client/galaxy/scripts/qunit/tests/workflow_editor_tests.js
index 2836d353f27..4db44c86556 100644
--- a/client/galaxy/scripts/qunit/tests/workflow_editor_tests.js
+++ b/client/galaxy/scripts/qunit/tests/workflow_editor_tests.js
@@ -545,6 +545,8 @@ QUnit.module("Node view ", {
             input_terminals: {},
             output_terminals: {},
             markChanged: function() {},
+            hasConnectedOutputTerminals: function() {},
+            connectedMappedInputTerminals: function() {},
             terminalMapping: { disableMapOver: function() {} }
         });
     },
@@ -1174,7 +1176,14 @@ QUnit.test("multiple input attachable by collections", function(assert) {
     this.verifyAttachable(assert, this.inputTerminal1, "list");
 });
 
-QUnit.test("unconnected multiple inputs cannot be connected to rank > 1 collections (yet...)", function(assert) {
+QUnit.test("multiple input attachable by nested collections", function(assert) {
+    this.inputTerminal1 = this.newInputTerminal(null, { multiple: true });
+    var connectedInput1 = this.addConnectedInput(this.inputTerminal1);
+    this.addConnectedOutput(connectedInput1);
+    this.verifyAttachable(assert, this.inputTerminal1, "list:list");
+});
+
+QUnit.test("Multiple inputs cannot be connected to pairs", function(assert) {
     this.inputTerminal1 = this.newInputTerminal(null, { multiple: true });
     this.verifyNotAttachable(assert, this.inputTerminal1, "list:paired");
 });