diff --git a/core/modules/filterrunprefixes/filter.js b/core/modules/filterrunprefixes/filter.js
index 726732c8e..72b7ce24c 100644
--- a/core/modules/filterrunprefixes/filter.js
+++ b/core/modules/filterrunprefixes/filter.js
@@ -13,12 +13,12 @@ module-type: filterrunprefix
 /*
 Export our filter function
 */
-exports.filter = function(operationSubFunction) {
+exports.filter = function(operationSubFunction,options) {
 	return function(results,source,widget) {
 		if(results.length > 0) {
 			var resultsToRemove = [];
 			$tw.utils.each(results,function(result) {
-				var filtered = operationSubFunction($tw.wiki.makeTiddlerIterator([result]),widget);
+				var filtered = operationSubFunction(options.wiki.makeTiddlerIterator([result]),widget);
 				if(filtered.length === 0) {
 					resultsToRemove.push(result);
 				}
diff --git a/editions/test/tiddlers/tests/test-prefixes-filter.js b/editions/test/tiddlers/tests/test-prefixes-filter.js
new file mode 100644
index 000000000..7c88aeaf2
--- /dev/null
+++ b/editions/test/tiddlers/tests/test-prefixes-filter.js
@@ -0,0 +1,113 @@
+/*\
+title: test-prefixes-filters.js
+type: application/javascript
+tags: [[$:/tags/test-spec]]
+Tests the reduce prefix and filter.
+\*/
+(function(){
+
+/* jslint node: true, browser: true */
+/* eslint-env node, browser, jasmine */
+/* eslint no-mixed-spaces-and-tabs: ["error", "smart-tabs"]*/
+/* global $tw, require */
+"use strict";
+
+describe("'reduce' and 'intersection' filter prefix tests", function() {
+
+	var wiki = new $tw.Wiki();
+
+	wiki.addTiddler({
+		title: "Brownies",
+		text: "//This is a sample shopping list item for the [[Shopping List Example]]//",
+		tags: ["shopping","food"],
+		price: "4.99",
+		quantity: "1"
+	});
+	wiki.addTiddler({
+		title: "Chick Peas",
+		text: "//This is a sample shopping list item for the [[Shopping List Example]]//",
+		tags: ["shopping","food"],
+		price: "1.32",
+		quantity: "5"
+	});
+	wiki.addTiddler({
+		title: "Milk",
+		text: "//This is a sample shopping list item for the [[Shopping List Example]]//",
+		tags: ["shopping", "dairy", "drinks"],
+		price: "0.46",
+		quantity: "12"
+	});
+	wiki.addTiddler({
+		title: "Rice Pudding",
+		price: "2.66",
+		quantity: "4",
+		tags: ["shopping", "dairy"],
+		text: "//This is a sample shopping list item for the [[Shopping List Example]]//"
+	});
+	wiki.addTiddler({
+		title: "Sparkling water",
+		tags: ["drinks", "mineral water", "textexample"],
+		text: "This is some text"
+	});
+	wiki.addTiddler({
+		title: "Red wine",
+		tags: ["drinks", "wine", "textexample"],
+		text: "This is some more text"
+	});
+	wiki.addTiddler({
+		title: "Cheesecake",
+		tags: ["cakes", "food", "textexample"],
+		text: "This is even even even more text"
+	});
+	wiki.addTiddler({
+		title: "Chocolate Cake",
+		tags: ["cakes", "food", "textexample"],
+		text: "This is even more text"
+	});
+
+	it("should handle the :reduce filter prefix", function() {
+		expect(wiki.filterTiddlers("[tag[shopping]] :reduce[get[quantity]add<accumulator>]").join(",")).toBe("22");
+		expect(wiki.filterTiddlers("[tag[shopping]] :reduce[get[price]multiply{!!quantity}add<accumulator>]").join(",")).toBe("27.75");
+		expect(wiki.filterTiddlers("[tag[shopping]] :reduce[<index>compare:number:gt[0]then<accumulator>addsuffix[, ]addsuffix<currentTiddler>else<currentTiddler>]").join(",")).toBe("Brownies, Chick Peas, Milk, Rice Pudding");
+		expect(wiki.filterTiddlers("[tag[non-existent]] :reduce[get[price]multiply{!!quantity}add<accumulator>] :else[[0]]").join(",")).toBe("0");
+	});
+
+	it("should handle the reduce operator", function() {
+		var widget = require("$:/core/modules/widgets/widget.js");
+		var rootWidget = new widget.widget({ type:"widget", children:[ {type:"widget", children:[]} ] },
+										   { wiki:wiki, document:$tw.document});
+		rootWidget.makeChildWidgets();
+		var anchorWidget = rootWidget.children[0];
+		rootWidget.setVariable("add-price","[get[price]multiply{!!quantity}add<accumulator>]");
+		rootWidget.setVariable("num-items","[get[quantity]add<accumulator>]");
+		rootWidget.setVariable("join-with-commas","[<index>compare:number:gt[0]then<accumulator>addsuffix[, ]addsuffix<currentTiddler>else<currentTiddler>]");
+
+		expect(wiki.filterTiddlers("[tag[shopping]reduce<num-items>]",anchorWidget).join(",")).toBe("22");
+		expect(wiki.filterTiddlers("[tag[shopping]reduce<add-price>]",anchorWidget).join(",")).toBe("27.75");
+		expect(wiki.filterTiddlers("[tag[shopping]reduce<join-with-commas>]",anchorWidget).join(",")).toBe("Brownies, Chick Peas, Milk, Rice Pudding");
+		expect(wiki.filterTiddlers("[tag[non-existent]reduce<add-price>,[0]]",anchorWidget).join(",")).toBe("0");
+	});
+
+	it("should handle the :intersection prefix", function() {
+		expect(wiki.filterTiddlers("[[Sparkling water]tags[]] :intersection[[Red wine]tags[]]").join(",")).toBe("drinks,textexample");
+		expect(wiki.filterTiddlers("[[Brownies]tags[]] :intersection[[Chocolate Cake]tags[]]").join(",")).toBe("food");
+		expect(wiki.filterTiddlers("[tag[shopping]] :intersection[tag[food]]").join(",")).toBe("Brownies,Chick Peas");
+		expect(wiki.filterTiddlers("[tag[shopping]] :intersection[tag[drinks]]").join(",")).toBe("Milk");
+		expect(wiki.filterTiddlers("[tag[shopping]] :intersection[tag[wine]]").join(",")).toBe("");
+	});
+	
+	it("should handle the :filter prefix and filter operator", function() {
+		var widget = require("$:/core/modules/widgets/widget.js");
+		var rootWidget = new widget.widget({ type:"widget", children:[ {type:"widget", children:[]} ] },
+										   { wiki:wiki, document:$tw.document});
+		rootWidget.makeChildWidgets();
+		var anchorWidget = rootWidget.children[0];
+		rootWidget.setVariable("larger-than-18","[get[text]length[]compare:integer:gteq[18]]");
+		expect(wiki.filterTiddlers("[tag[textexample]] :filter[get[text]length[]compare:integer:gteq[18]]",anchorWidget).join(",")).toBe("Red wine,Cheesecake,Chocolate Cake");
+		expect(wiki.filterTiddlers("[tag[textexample]]",anchorWidget).join(",")).toBe("Sparkling water,Red wine,Cheesecake,Chocolate Cake");
+		expect(wiki.filterTiddlers("[tag[textexample]filter<larger-than-18>]",anchorWidget).join(",")).toBe("Red wine,Cheesecake,Chocolate Cake");
+	})
+
+});
+
+})();
\ No newline at end of file