diff --git a/.gitignore b/.gitignore
index c925c21..22e348d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /dist
 /node_modules
+/tests/multidep
diff --git a/package.json b/package.json
index 89682c3..4b00fc9 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "jsnext:main": "dist/es6/index.js",
   "scripts": {
     "build": "node ./scripts/build.js",
-    "pretest": "npm run build",
+    "pretest": "npm run build && multidep tests/multidep.json",
     "test": "mocha dist/cjs/tests/index.js",
     "test:debug": "npm run build && mocha --no-timeouts debug dist/cjs/tests/index.js",
     "prepublish": "npm run build"
@@ -24,6 +24,7 @@
     "chai": "^3.5.0",
     "heimdalljs": "^0.2.3",
     "mocha": "^3.2.0",
+    "multidep": "^2.0.1",
     "rollup": "^0.37.0",
     "rollup-plugin-babel": "^2.7.0",
     "rollup-plugin-commonjs": "^5.0.5",
diff --git a/scripts/build.js b/scripts/build.js
index d74aabe..6bffd4d 100755
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -12,7 +12,7 @@ function build(entry, dest, format) {
     entry: entry,
 
     external: [
-      'fs', 'heimdalljs', 'chai'
+      'fs', 'heimdalljs', 'chai', 'multidep'
     ],
     plugins: [
       babel({ exclude: 'node_modules/**' }),
diff --git a/tests/multidep.json b/tests/multidep.json
new file mode 100644
index 0000000..661887a
--- /dev/null
+++ b/tests/multidep.json
@@ -0,0 +1,6 @@
+{
+  "path": "tests/multidep",
+  "versions": {
+    "heimdalljs": ["0.2.3"]
+  }
+}
diff --git a/tests/runtimes/node.js b/tests/runtimes/node.js
index 9adf807..10deaa8 100644
--- a/tests/runtimes/node.js
+++ b/tests/runtimes/node.js
@@ -1,7 +1,18 @@
-// import tests from shared to kick them off
-import '../shared';
+import multidep from 'multidep';
+const multidepRequire = multidep('tests/multidep.json');
+
+import testGenerator from '../shared';
 
 describe('heimdalljs-graph', function() {
+  multidepRequire.forEachVersion('heimdalljs', function(version, _heimdall) {
+    describe(`heimdalljs@${version}`, function() {
+      // the entry point script _really_ should include a way to
+      // access Heimdall itself (and not just the default session)
+      let Heimdall = Object.getPrototypeOf(_heimdall).constructor;
+      testGenerator(Heimdall, version);
+    });
+  });
+
   describe('loadFromFile', function() {
     it('works');
   });
diff --git a/tests/shared.js b/tests/shared.js
index 1253d08..dfb84dd 100644
--- a/tests/shared.js
+++ b/tests/shared.js
@@ -1,12 +1,10 @@
 import chai from 'chai';
-import Heimdall from 'heimdalljs/heimdall';
-import { loadFromNode } from '../src';
+import { loadFromNode, loadFromJSON } from '../src';
 
 const { expect } = chai;
 
-describe('heimdalljs-graph-shared', function() {
+export default function testGenerator(Heimdall, version) {
   let node;
-
   class StatsSchema {
     constructor() {
       this.x = 0;
@@ -29,22 +27,42 @@ describe('heimdalljs-graph-shared', function() {
       \
        d
     */
-
-    let j = heimdall.start('j');
-    let f = heimdall.start('f');
-    let a = heimdall.start('a');
-    let d = heimdall.start('d');
-    d.stop();
-    a.stop();
-    let h = heimdall.start('h');
-    h.stop();
-    f.stop();
-    let k = heimdall.start('k');
-    let z = heimdall.start('z');
-    z.stop();
-    k.stop();
-
-    node = heimdall.root._children[0];
+    if (version === '0.2.3') {
+      let j = heimdall.start('j');
+      let f = heimdall.start('f');
+      let a = heimdall.start('a');
+      let d = heimdall.start('d');
+      d.stop();
+      a.stop();
+      let h = heimdall.start('h');
+      h.stop();
+      f.stop();
+      let k = heimdall.start('k');
+      let z = heimdall.start('z');
+      z.stop();
+      k.stop();
+
+      node = heimdall.root._children[0];
+    } else {
+      let j = heimdall.start('j');
+      let f = heimdall.start('f');
+      let a = heimdall.start('a');
+      let d = heimdall.start('d');
+      heimdall.stop(d);
+      heimdall.stop(a);
+      let h = heimdall.start('h');
+      heimdall.stop(h);
+      heimdall.stop(f);
+      let k = heimdall.start('k');
+      let z = heimdall.start('z');
+      heimdall.stop(z);
+      heimdall.stop(k);
+
+      // this should not be needed
+      // we should be able to pass the current
+      // `heimdall` node directly
+      node = new Heimdall.Tree(heimdall);
+    }
   });
 
   describe('.loadFromNode', function() {
@@ -146,4 +164,58 @@ describe('heimdalljs-graph-shared', function() {
       ]);
     });
   });
-});
+
+  describe('.loadFromJSON', function() {
+    it('works with broccoli-viz output from heimdall@0.2', function() {
+      let data = {
+        nodes: [
+          {
+            _id: 1,
+            id: { name: 'j' },
+            stats: { own: {}, time: { self: 2734} },
+            children: [ 2, 6 ]
+          }, {
+            _id: 2,
+            id: { name: 'f' },
+            stats: { own: {}, time: { self: 2257} },
+            children: [ 3, 5 ]
+          }, {
+            _id: 3,
+            id: { name: 'a' },
+            stats: { own: {}, time: { self: 1842} },
+            children: [ 4 ]
+          }, {
+            _id: 4,
+            id: { name: 'd' },
+            stats: { own: {}, time: { self: 1738} },
+            children: []
+          }, {
+            _id: 5,
+            id: { name: 'h' },
+            stats: { own: {}, time: { self: 1245 } },
+            children: []
+          }, {
+            _id: 6,
+            id: { name: 'k' },
+            stats: { own: {}, time: { self: 1596 } },
+            children: [ 7 ]
+          }, {
+            _id: 7,
+            id: { name: 'z' },
+            stats: { own: {}, time: { self: 1229 } },
+            children: []
+          }
+        ]
+      };
+
+      let tree = loadFromJSON(data);
+      let names = [];
+      for (let node of tree.dfsIterator()) {
+        names.push(node.label.name);
+      }
+      expect(names, 'depth first, pre order').to.eql([
+        'j','f','a','d','h','k','z'
+      ]);
+    });
+  });
+}
diff --git a/yarn.lock b/yarn.lock
index fdcf3cd..0ec014d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -527,7 +527,7 @@ fs.realpath@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
 
-glob@7.0.5:
+glob@7.0.5, glob@^7.0.5:
   version "7.0.5"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.0.5.tgz#b4202a69099bbb4d292a7c1b95b6682b67ebdc95"
   dependencies:
@@ -715,6 +715,14 @@ ms@0.7.1:
   version "0.7.1"
   resolved "https://registry.yarnpkg.com/ms/-/ms-0.7.1.tgz#9cd13c03adbff25b65effde7ce864ee952017098"
 
+multidep@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/multidep/-/multidep-2.0.1.tgz#a98c498243b5d077ef368ff50039130858904d02"
+  dependencies:
+    rimraf "^2.4.3"
+    rsvp "^3.1.0"
+    spawn-cmd "0.0.2"
+
 number-is-nan@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/number-is-nan/-/number-is-nan-1.0.1.tgz#097b602b53422a522c1afb8790318336941a011d"
@@ -793,6 +801,12 @@ resolve@^1.1.6, resolve@^1.1.7:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.2.0.tgz#9589c3f2f6149d1417a40becc1663db6ec6bc26c"
 
+rimraf@^2.4.3:
+  version "2.5.4"
+  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.5.4.tgz#96800093cbf1a0c86bd95b4625467535c29dfa04"
+  dependencies:
+    glob "^7.0.5"
+
 rollup-plugin-babel@^2.7.0:
   version "2.7.1"
   resolved "https://registry.yarnpkg.com/rollup-plugin-babel/-/rollup-plugin-babel-2.7.1.tgz#16528197b0f938a1536f44683c7a93d573182f57"
@@ -839,7 +853,7 @@ rollup@^0.37.0:
   dependencies:
     source-map-support "^0.4.0"
 
-rsvp@~3.2.1:
+rsvp@^3.1.0, rsvp@~3.2.1:
   version "3.2.1"
   resolved "https://registry.yarnpkg.com/rsvp/-/rsvp-3.2.1.tgz#07cb4a5df25add9e826ebc67dcc9fd89db27d84a"
 
@@ -857,6 +871,10 @@ source-map@^0.5.0, source-map@^0.5.3:
   version "0.5.6"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.6.tgz#75ce38f52bf0733c5a7f0c118d81334a2bb5f412"
 
+spawn-cmd@0.0.2:
+  version "0.0.2"
+  resolved "https://registry.yarnpkg.com/spawn-cmd/-/spawn-cmd-0.0.2.tgz#6d5e251fad0eab00b0f193d245669a7a228ec0de"
+
 strip-ansi@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-3.0.1.tgz#6a385fb8853d952d5ff05d0e8aaf94278dc63dcf"