diff --git a/lib/array.js b/lib/array.js
index b4711fdb..0077f262 100644
--- a/lib/array.js
+++ b/lib/array.js
@@ -16,14 +16,10 @@ const { promisify } = require('util');
 //     result - <Iterable>
 const map = (items, fn, done = common.emptiness) => {
   const isArray = Array.isArray(items);
-  try {
-    asyncIter(items)
-      .parallel(promisify(fn))
-      .then(res => done(null, isArray ? res : new items.constructor(res)))
-      .catch(done);
-  } catch (err) {
-    done(err);
-  }
+  asyncIter(items)
+    .parallel(promisify(fn))
+    .then(res => done(null, isArray ? res : new items.constructor(res)))
+    .catch(done);
 };
 
 // Non-blocking synchronous map
@@ -44,17 +40,11 @@ const asyncMap = (items, fn, options = {}, done = common.emptiness) => {
     options = {};
   }
   const isArray = Array.isArray(items);
-  try {
-    const iter = asyncIter(items)
-      .map(promisify(fn))
-      .throttle(options.percent, options.min);
-    const collect = isArray
-      ? iter.toArray()
-      : iter.collectTo(items.constructor);
-    collect.then(res => done(null, res)).catch(done);
-  } catch (err) {
-    done(err);
-  }
+  const iter = asyncIter(items)
+    .map(promisify(fn))
+    .throttle(options.percent, options.min);
+  const collect = isArray ? iter.toArray() : iter.collectTo(items.constructor);
+  collect.then(res => done(null, res)).catch(done);
 };
 
 // Asynchronous filter (iterate parallel)
@@ -76,19 +66,15 @@ const asyncMap = (items, fn, options = {}, done = common.emptiness) => {
 // );
 const filter = (items, fn, done = common.emptiness) => {
   const isArray = Array.isArray(items);
-  try {
-    asyncIter(items)
-      .parallel(async item => [await promisify(fn)(item), item])
-      .then(res => {
-        const filtered = res
-          .filter(([predicateResult]) => predicateResult)
-          .map(([, item]) => item);
-        done(null, isArray ? filtered : new items.constructor(filtered));
-      })
-      .catch(done);
-  } catch (err) {
-    done(err);
-  }
+  asyncIter(items)
+    .parallel(async item => [await promisify(fn)(item), item])
+    .then(res => {
+      const filtered = res
+        .filter(([predicateResult]) => predicateResult)
+        .map(([, item]) => item);
+      done(null, isArray ? filtered : new items.constructor(filtered));
+    })
+    .catch(done);
 };
 
 // Asynchronous reduce
@@ -110,14 +96,10 @@ const filter = (items, fn, done = common.emptiness) => {
 //   initial - <any>, optional value to be used as first
 //       argument in first iteration
 const reduce = (items, fn, done = common.emptiness, initial) => {
-  try {
-    asyncIter(items)
-      .reduce((prev, cur) => promisify(fn)(prev, cur), initial)
-      .then(res => done(null, res))
-      .catch(done);
-  } catch (err) {
-    done(err);
-  }
+  asyncIter(items)
+    .reduce((prev, cur) => promisify(fn)(prev, cur), initial)
+    .then(res => done(null, res))
+    .catch(done);
 };
 
 // Asynchronous reduceRight
@@ -139,14 +121,10 @@ const reduce = (items, fn, done = common.emptiness, initial) => {
 //   initial - <any>, optional value to be used as first
 //       argument in first iteration
 const reduceRight = (items, fn, done = common.emptiness, initial) => {
-  try {
-    asyncIter(items)
-      .reduceRight((prev, cur) => promisify(fn)(prev, cur), initial)
-      .then(res => done(null, res))
-      .catch(done);
-  } catch (err) {
-    done(err);
-  }
+  asyncIter(items)
+    .reduceRight((prev, cur) => promisify(fn)(prev, cur), initial)
+    .then(res => done(null, res))
+    .catch(done);
 };
 
 // Asynchronous each (iterate in parallel)
@@ -169,14 +147,10 @@ const reduceRight = (items, fn, done = common.emptiness, initial) => {
 //   (err, data) => console.dir('each done')
 // );
 const each = (items, fn, done = common.emptiness) => {
-  try {
-    asyncIter(items)
-      .parallel(promisify(fn))
-      .then(res => done(null, res))
-      .catch(done);
-  } catch (err) {
-    done(err);
-  }
+  asyncIter(items)
+    .parallel(promisify(fn))
+    .then(res => done(null, res))
+    .catch(done);
 };
 
 // Asynchronous series
@@ -201,14 +175,10 @@ const each = (items, fn, done = common.emptiness) => {
 //   }
 // );
 const series = (items, fn, done = common.emptiness) => {
-  try {
-    asyncIter(items)
-      .each(promisify(fn))
-      .then(res => done(null, res))
-      .catch(done);
-  } catch (err) {
-    done(err);
-  }
+  asyncIter(items)
+    .each(promisify(fn))
+    .then(res => done(null, res))
+    .catch(done);
 };
 
 // Asynchronous find (iterate in series)
@@ -231,14 +201,10 @@ const series = (items, fn, done = common.emptiness) => {
 //   }
 // );
 const find = (items, fn, done = common.emptiness) => {
-  try {
-    asyncIter(items)
-      .find(promisify(fn))
-      .then(res => done(null, res))
-      .catch(done);
-  } catch (err) {
-    done(err);
-  }
+  asyncIter(items)
+    .find(promisify(fn))
+    .then(res => done(null, res))
+    .catch(done);
 };
 
 // Asynchronous every
@@ -252,14 +218,10 @@ const find = (items, fn, done = common.emptiness) => {
 //     err - <Error> | <null>
 //     result - <boolean>
 const every = (items, fn, done = common.emptiness) => {
-  try {
-    asyncIter(items)
-      .parallel(promisify(fn))
-      .then(res => done(null, res.every(e => e)))
-      .catch(done);
-  } catch (err) {
-    done(err);
-  }
+  asyncIter(items)
+    .parallel(promisify(fn))
+    .then(res => done(null, res.every(e => e)))
+    .catch(done);
 };
 
 // Asynchronous some (iterate in series)
@@ -273,14 +235,10 @@ const every = (items, fn, done = common.emptiness) => {
 //     err - <Error> | <null>
 //     result - <boolean>
 const some = (items, fn, done = common.emptiness) => {
-  try {
-    asyncIter(items)
-      .some(promisify(fn))
-      .then(res => done(null, res))
-      .catch(done);
-  } catch (err) {
-    done(err);
-  }
+  asyncIter(items)
+    .some(promisify(fn))
+    .then(res => done(null, res))
+    .catch(done);
 };
 
 module.exports = {
diff --git a/test/array.asyncMap.js b/test/array.asyncMap.js
index 5259f03d..b4f27382 100644
--- a/test/array.asyncMap.js
+++ b/test/array.asyncMap.js
@@ -88,11 +88,11 @@ metatests.test('asyncMap with error', test => {
 
 metatests.test('asyncMap with not iterable', test => {
   const obj = { a: '1', b: '2', c: '3' };
-  const expectedError = new TypeError('Base is not Iterable');
 
-  metasync.asyncMap(obj, test.mustNotCall(), (err, res) => {
-    test.isError(err, expectedError);
-    test.assertNot(res);
-    test.end();
-  });
+  test.throws(
+    () => metasync.asyncMap(obj, test.mustNotCall(), test.mustNotCall()),
+    new TypeError('Base is not Iterable')
+  );
+
+  test.end();
 });
diff --git a/test/array.filter.js b/test/array.filter.js
index b4f993c4..0f56dce3 100644
--- a/test/array.filter.js
+++ b/test/array.filter.js
@@ -94,11 +94,11 @@ metatests.test('filter with error', test => {
 
 metatests.test('filter with not iterable', test => {
   const obj = { a: '1', b: '2', c: '3' };
-  const expectedError = new TypeError('Base is not Iterable');
 
-  metasync.filter(obj, test.mustNotCall(), (err, res) => {
-    test.isError(err, expectedError);
-    test.assertNot(res);
-    test.end();
-  });
+  test.throws(
+    () => metasync.filter(obj, test.mustNotCall(), test.mustNotCall()),
+    new TypeError('Base is not Iterable')
+  );
+
+  test.end();
 });
diff --git a/test/array.map.js b/test/array.map.js
index bc96d929..d1cf0e7b 100644
--- a/test/array.map.js
+++ b/test/array.map.js
@@ -70,11 +70,11 @@ metatests.test('map with error', test => {
 
 metatests.test('map with not iterable', test => {
   const obj = { a: '1', b: '2', c: '3' };
-  const expectedError = new TypeError('Base is not Iterable');
 
-  metasync.map(obj, test.mustNotCall(), (err, res) => {
-    test.isError(err, expectedError);
-    test.strictSame(res, undefined);
-    test.end();
-  });
+  test.throws(
+    () => metasync.map(obj, test.mustNotCall(), test.mustNotCall()),
+    new TypeError('Base is not Iterable')
+  );
+
+  test.end();
 });