diff --git a/src/eckey.js b/src/eckey.js
index b109ae3..170b9dc 100644
--- a/src/eckey.js
+++ b/src/eckey.js
@@ -27,7 +27,7 @@ ECKey.fromWIF = function(string) {
   var compressed = false
 
   if (payload.length === 33) {
-    assert.strictEqual(payload[32], 0x01, 'Invalid WIF string')
+    assert.strictEqual(payload[32], 0x01, 'Invalid compression flag')
 
     payload = payload.slice(0, -1)
     compressed = true
diff --git a/test/eckey.js b/test/eckey.js
index 80afec4..34ce21a 100644
--- a/test/eckey.js
+++ b/test/eckey.js
@@ -21,8 +21,8 @@ describe('ECKey', function() {
       assert.equal(privKey.pub.compressed, false)
     })
 
-    it('calculates the matching pubKey', function() {
-      fixtures.valid.forEach(function(f) {
+    fixtures.valid.forEach(function(f) {
+      it('calculates the matching pubKey for ' + f.D, function() {
         var privKey = new ECKey(new BigInteger(f.D))
 
         assert.equal(privKey.pub.Q.toString(), f.Q.toString())
@@ -30,18 +30,18 @@ describe('ECKey', function() {
     })
 
     fixtures.invalid.constructor.forEach(function(f) {
-      it('throws on ' + f.description, function() {
+      it('throws on ' + f.D, function() {
         assert.throws(function() {
           new ECKey(new BigInteger(f.D))
-        })
+        }, new RegExp(f.exception))
       })
     })
   })
 
   describe('fromWIF', function() {
-    it('matches the test vectors', function() {
-      fixtures.valid.forEach(function(f) {
-        f.WIFs.forEach(function(wif) {
+    fixtures.valid.forEach(function(f) {
+      f.WIFs.forEach(function(wif) {
+        it('imports ' + wif.string + ' correctly', function() {
           var privKey = ECKey.fromWIF(wif.string)
 
           assert.equal(privKey.D.toString(), f.D)
@@ -51,18 +51,18 @@ describe('ECKey', function() {
     })
 
     fixtures.invalid.WIF.forEach(function(f) {
-      it('throws on ' + f.description, function() {
+      it('throws on ' + f.string, function() {
         assert.throws(function() {
           ECKey.fromWIF(f.string)
-        })
+        }, new RegExp(f.exception))
       })
     })
   })
 
   describe('toWIF', function() {
-    it('matches the test vectors', function() {
-      fixtures.valid.forEach(function(f) {
-        f.WIFs.forEach(function(wif) {
+    fixtures.valid.forEach(function(f) {
+      f.WIFs.forEach(function(wif) {
+        it('exports ' + wif.string + ' correctly', function() {
           var privKey = ECKey.fromWIF(wif.string)
           var version = networks[wif.network].wif
           var result = privKey.toWIF(version)
diff --git a/test/fixtures/eckey.json b/test/fixtures/eckey.json
index 11736ec..923ed42 100644
--- a/test/fixtures/eckey.json
+++ b/test/fixtures/eckey.json
@@ -68,29 +68,29 @@
   "invalid": {
     "constructor": [
       {
-        "description": "Private key ZERO",
+        "exception": "Private key must be greater than 0",
         "D": "0"
       },
       {
-        "description": "Private key equal to the curve order",
+        "exception": "Private key must be less than the curve order",
         "D": "115792089237316195423570985008687907852837564279074904382605163141518161494337"
       },
       {
-        "description": "Private key greater than the curve order",
+        "exception": "Private key must be less than the curve order",
         "D": "115792089237316195423570985008687907853269984665640564039457584007913129639935"
       }
     ],
     "WIF": [
       {
-        "description": "Invalid compression flag",
+        "exception": "Invalid compression flag",
         "string": "ju9rooVsmagsb4qmNyTysUSFB1GB6MdpD7eoGjUTPmZRAApJxRz"
       },
       {
-        "description": "Payload too short",
+        "exception": "Invalid WIF payload length",
         "string": "7ZEtRQLhCsDQrd6ZKfmcESdXgas8ggZPN24ByEi5ey6VJW"
       },
       {
-        "description": "Payload too long",
+        "exception": "Invalid WIF payload length",
         "string": "5qibUKwsnMo1qDiNp3prGaQkD2JfVJa8F8Na87H2CkMHvuVg6uKhw67Rh"
       }
     ]