diff --git a/bin/fake-elm b/bin/fake-elm
index f41898f..6bd5a44 100755
--- a/bin/fake-elm
+++ b/bin/fake-elm
@@ -3,7 +3,7 @@
 var yargs = require("yargs");
 var spawn = require("child_process").spawn;
 var fs = require("fs-extra");
-var which = require("which");
+var which = require("npm-which")(process.cwd());
 
 var elmBinary = which.sync("elm");
 
diff --git a/lib/runner.js b/lib/runner.js
index fab55e2..36eddda 100644
--- a/lib/runner.js
+++ b/lib/runner.js
@@ -106,17 +106,21 @@ var setupTests = (log, args) => () => {
 var runTests = (log, args) => () => {
     log.info("testRunInit", "Running tests...");
     return new Promise(function(resolve, reject) {
+        var elmTest = args["elm-test"];
+        if (elmTest !== "elm-test") {
+            elmTest = path.resolve(elmTest);
+        }
         log.debug(
             "testRun",
             "spawning " +
-                args["elm-test"] +
+                elmTest +
                 " --compiler " +
                 fakeElmBinary +
                 " " +
                 args.tests
         );
         var process = spawn(
-            args["elm-test"],
+            elmTest,
             ["--compiler", fakeElmBinary, args.tests]
                 .concat(args._)
                 .concat(args.report === "json" ? ["--report", "json"] : []),
diff --git a/package-lock.json b/package-lock.json
index 0b9673c..4712420 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,6 +19,7 @@
                 "fs-extra": "^4.0.3",
                 "lodash": "^4.17.15",
                 "moment": "^2.24.0",
+                "npm-which": "^3.0.1",
                 "opn": "^5.5.0",
                 "request": "^2.88.0",
                 "table": "^6.8.0",
@@ -1472,6 +1473,41 @@
                 "node": ">=0.10.0"
             }
         },
+        "node_modules/npm-path": {
+            "version": "2.0.4",
+            "resolved": "https://registry.npmjs.org/npm-path/-/npm-path-2.0.4.tgz",
+            "integrity": "sha512-IFsj0R9C7ZdR5cP+ET342q77uSRdtWOlWpih5eC+lu29tIDbNEgDbzgVJ5UFvYHWhxDZ5TFkJafFioO0pPQjCw==",
+            "dependencies": {
+                "which": "^1.2.10"
+            },
+            "bin": {
+                "npm-path": "bin/npm-path"
+            },
+            "engines": {
+                "node": ">=0.8"
+            }
+        },
+        "node_modules/npm-which": {
+            "version": "3.0.1",
+            "resolved": "https://registry.npmjs.org/npm-which/-/npm-which-3.0.1.tgz",
+            "integrity": "sha1-kiXybsOihcIJyuZ8OxGmtKtxQKo=",
+            "dependencies": {
+                "commander": "^2.9.0",
+                "npm-path": "^2.0.2",
+                "which": "^1.2.10"
+            },
+            "bin": {
+                "npm-which": "bin/npm-which.js"
+            },
+            "engines": {
+                "node": ">=4.2.0"
+            }
+        },
+        "node_modules/npm-which/node_modules/commander": {
+            "version": "2.20.3",
+            "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
+            "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ=="
+        },
         "node_modules/oauth-sign": {
             "version": "0.9.0",
             "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
@@ -3420,6 +3456,31 @@
             "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
             "integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA=="
         },
+        "npm-path": {
+            "version": "2.0.4",
+            "resolved": "https://registry.npmjs.org/npm-path/-/npm-path-2.0.4.tgz",
+            "integrity": "sha512-IFsj0R9C7ZdR5cP+ET342q77uSRdtWOlWpih5eC+lu29tIDbNEgDbzgVJ5UFvYHWhxDZ5TFkJafFioO0pPQjCw==",
+            "requires": {
+                "which": "^1.2.10"
+            }
+        },
+        "npm-which": {
+            "version": "3.0.1",
+            "resolved": "https://registry.npmjs.org/npm-which/-/npm-which-3.0.1.tgz",
+            "integrity": "sha1-kiXybsOihcIJyuZ8OxGmtKtxQKo=",
+            "requires": {
+                "commander": "^2.9.0",
+                "npm-path": "^2.0.2",
+                "which": "^1.2.10"
+            },
+            "dependencies": {
+                "commander": {
+                    "version": "2.20.3",
+                    "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
+                    "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ=="
+                }
+            }
+        },
         "oauth-sign": {
             "version": "0.9.0",
             "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
diff --git a/package.json b/package.json
index 43e046f..6622842 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
         "fs-extra": "^4.0.3",
         "lodash": "^4.17.15",
         "moment": "^2.24.0",
+        "npm-which": "^3.0.1",
         "opn": "^5.5.0",
         "request": "^2.88.0",
         "table": "^6.8.0",