diff --git a/pom.xml b/pom.xml
index 9af879b..1748dfb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -77,6 +77,12 @@
       <groupId>org.hamcrest</groupId>
       <artifactId>hamcrest</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <version>5.6.2</version>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter-params</artifactId>
diff --git a/src/main/java/org/llorllale/cactoos/matchers/Assert.java b/src/main/java/org/llorllale/cactoos/matchers/Assert.java
new file mode 100644
index 0000000..7928a25
--- /dev/null
+++ b/src/main/java/org/llorllale/cactoos/matchers/Assert.java
@@ -0,0 +1,48 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) for portions of project cactoos-matchers are held by
+ * Yegor Bugayenko, 2017-2018, as part of project cactoos.
+ * All other copyright for project cactoos-matchers are held by
+ * George Aristy, 2018-2020.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.llorllale.cactoos.matchers;
+
+import org.cactoos.Text;
+
+/**
+ * Assertion with textual description.
+ *
+ * @since 1.0.0
+ */
+public interface Assert {
+    /**
+     * Description.
+     * @return Message of assert.
+     */
+    Text description();
+
+    /**
+     * Affirm this assertion.
+     * @throws AssertionError if this assertion is refuted
+     */
+    void affirm() throws AssertionError;
+}
diff --git a/src/main/java/org/llorllale/cactoos/matchers/AssertAll.java b/src/main/java/org/llorllale/cactoos/matchers/AssertAll.java
new file mode 100644
index 0000000..4fb162e
--- /dev/null
+++ b/src/main/java/org/llorllale/cactoos/matchers/AssertAll.java
@@ -0,0 +1,138 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) for portions of project cactoos-matchers are held by
+ * Yegor Bugayenko, 2017-2018, as part of project cactoos.
+ * All other copyright for project cactoos-matchers are held by
+ * George Aristy, 2018-2020.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.llorllale.cactoos.matchers;
+
+import org.cactoos.Text;
+import org.cactoos.iterable.IterableOf;
+import org.cactoos.iterable.MappedWithIndex;
+import org.cactoos.scalar.Folded;
+import org.cactoos.scalar.Mapped;
+import org.cactoos.scalar.Unchecked;
+import org.cactoos.text.FormattedText;
+import org.cactoos.text.Joined;
+import org.cactoos.text.TextOf;
+import org.cactoos.text.UncheckedText;
+
+/**
+ * Group assert.
+ * Fails if one of assertions fails.
+ *
+ * @since 1.0.0
+ * @checkstyle ClassDataAbstractionCoupling (100 lines)
+ */
+public final class AssertAll implements Assert {
+
+    /**
+     * Assertions.
+     */
+    private final Iterable<? extends Assert> assertions;
+
+    /**
+     * Description.
+     */
+    private final Text desc;
+
+    /**
+     * Ctor.
+     * @param description Description.
+     * @param assertions Assertions.
+     */
+    public AssertAll(
+        final String description,
+        final Assert... assertions
+    ) {
+        this(
+            description,
+            new IterableOf<>(assertions)
+        );
+    }
+
+    /**
+     * Ctor.
+     * @param description Description.
+     * @param assertions Assertions.
+     */
+    public AssertAll(
+        final String description,
+        final Iterable<? extends Assert> assertions
+    ) {
+        this.desc = new FormattedText(
+            "%s: %s",
+            new TextOf(description),
+            new Joined(
+                new TextOf(", "),
+                new MappedWithIndex<>(
+                    (check, num) -> new FormattedText(
+                        "%d) %s",
+                        num + 1,
+                        check.description().asString()
+                    ),
+                    assertions
+                )
+            )
+        );
+        this.assertions = assertions;
+    }
+
+    @Override
+    public Text description() {
+        return this.desc;
+    }
+
+    @SuppressWarnings(
+        { "PMD.AvoidCatchingGenericException", "PMD.AvoidCatchingThrowable" }
+    )
+    @Override
+    public void affirm() throws AssertionError {
+        new Unchecked<>(
+            new Mapped<Void>(
+                res -> {
+                    if (res.getSuppressed().length > 0) {
+                        throw res;
+                    }
+                    return null;
+                },
+                new Folded<>(
+                    new AssertionError(
+                        new UncheckedText(this.desc).asString()
+                    ),
+                    (res, check) -> {
+                        // @checkstyle IllegalCatchCheck (5 lines)
+                        try {
+                            check.affirm();
+                        } catch (final Throwable ex) {
+                            res.addSuppressed(ex);
+                        }
+                        return res;
+                    },
+                    this.assertions
+                )
+            )
+        ).value();
+    }
+
+}
diff --git a/src/main/java/org/llorllale/cactoos/matchers/AssertWith.java b/src/main/java/org/llorllale/cactoos/matchers/AssertWith.java
new file mode 100644
index 0000000..d1309ba
--- /dev/null
+++ b/src/main/java/org/llorllale/cactoos/matchers/AssertWith.java
@@ -0,0 +1,74 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) for portions of project cactoos-matchers are held by
+ * Yegor Bugayenko, 2017-2018, as part of project cactoos.
+ * All other copyright for project cactoos-matchers are held by
+ * George Aristy, 2018-2020.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.llorllale.cactoos.matchers;
+
+import org.cactoos.Func;
+import org.cactoos.Text;
+import org.cactoos.func.UncheckedFunc;
+
+/**
+ * Assert with value.
+ * @param <T> Type of value
+ *
+ * @since 1.0.0
+ */
+public final class AssertWith<T> implements Assert {
+    /**
+     * Value.
+     */
+    private final T value;
+
+    /**
+     * Assertion.
+     */
+    private final Func<? super T, ? extends Assert> func;
+
+    /**
+     * Ctor.
+     * @param value Value.
+     * @param func Function to produce assertion.
+     */
+    public AssertWith(
+        final T value,
+        final Func<? super T, ? extends Assert> func
+    ) {
+        this.value = value;
+        this.func = func;
+    }
+
+    @Override
+    public Text description() {
+        return new UncheckedFunc<>(this.func)
+            .apply(this.value)
+            .description();
+    }
+
+    @Override
+    public void affirm() throws AssertionError {
+        new UncheckedFunc<>(this.func).apply(this.value).affirm();
+    }
+}
diff --git a/src/main/java/org/llorllale/cactoos/matchers/Assertion.java b/src/main/java/org/llorllale/cactoos/matchers/Assertion.java
index 0d3df7b..5f5354b 100644
--- a/src/main/java/org/llorllale/cactoos/matchers/Assertion.java
+++ b/src/main/java/org/llorllale/cactoos/matchers/Assertion.java
@@ -26,6 +26,8 @@
  */
 package org.llorllale.cactoos.matchers;
 
+import org.cactoos.Text;
+import org.cactoos.text.TextOf;
 import org.hamcrest.Description;
 import org.hamcrest.Matcher;
 import org.hamcrest.StringDescription;
@@ -42,7 +44,7 @@
  *         new Assertion<>(
  *             "must match the string",
  *             new TextOf("string"),
- *             new TextIs("string")
+ *             new IsText("string")
  *         ).affirm();    // value is affirmed
  *     }
  * }
@@ -67,7 +69,7 @@
  *  Assertion, and ban all overloads of the former in forbidden-apis.txt.
  *  We should also look into banning common matchers like Matchers.is(), etc.
  */
-public final class Assertion<T> {
+public final class Assertion<T> implements Assert {
 
     /**
      * Message.
@@ -98,10 +100,7 @@ public Assertion(
         this.matcher = matcher;
     }
 
-    /**
-     * Affirm this assertion.
-     * @throws AssertionError if this assertion is refuted
-     */
+    @Override
     public void affirm() throws AssertionError {
         if (!this.matcher.matches(this.test)) {
             final Description text = new StringDescription();
@@ -116,4 +115,9 @@ public void affirm() throws AssertionError {
             throw new AssertionError(text.toString());
         }
     }
+
+    @Override
+    public Text description() {
+        return new TextOf(this.msg);
+    }
 }
diff --git a/src/main/java/org/llorllale/cactoos/matchers/FailsWith.java b/src/main/java/org/llorllale/cactoos/matchers/FailsWith.java
new file mode 100644
index 0000000..a557c55
--- /dev/null
+++ b/src/main/java/org/llorllale/cactoos/matchers/FailsWith.java
@@ -0,0 +1,86 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) for portions of project cactoos-matchers are held by
+ * Yegor Bugayenko, 2017-2018, as part of project cactoos.
+ * All other copyright for project cactoos-matchers are held by
+ * George Aristy, 2018-2020.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.llorllale.cactoos.matchers;
+
+import org.cactoos.scalar.ScalarOf;
+import org.hamcrest.Matcher;
+import org.hamcrest.core.IsAnything;
+import org.hamcrest.core.IsEqual;
+
+/**
+ * Matcher for Assert that fails.
+ *
+ * @since 1.0.0
+ */
+public final class FailsWith extends MatcherEnvelope<Assert> {
+    /**
+     * Ctor.
+     * @param type Expected error type.
+     * @param msg Expected message.
+     */
+    public FailsWith(
+        final Class<? extends Throwable> type,
+        final Matcher<String> msg
+    ) {
+        super(
+            new Satisfies<>(
+                new Throws<>(msg, type),
+                check -> new ScalarOf<>(
+                    check::affirm, true
+                )
+            )
+        );
+    }
+
+    /**
+     * Ctor.
+     * @param message Expected message.
+     */
+    public FailsWith(final Matcher<String> message) {
+        this(
+            AssertionError.class, message
+        );
+    }
+
+    /**
+     * Ctor.
+     * @param message Expected message.
+     */
+    public FailsWith(final String message) {
+        this(
+            new IsEqual<>(message)
+        );
+    }
+
+    /**
+     * Ctor.
+     * @param error Expected error type.
+     */
+    public FailsWith(final Class<? extends Throwable> error) {
+        this(error, new IsAnything<>());
+    }
+}
diff --git a/src/main/java/org/llorllale/cactoos/matchers/Passes.java b/src/main/java/org/llorllale/cactoos/matchers/Passes.java
new file mode 100644
index 0000000..dfe4e6b
--- /dev/null
+++ b/src/main/java/org/llorllale/cactoos/matchers/Passes.java
@@ -0,0 +1,53 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) for portions of project cactoos-matchers are held by
+ * Yegor Bugayenko, 2017-2018, as part of project cactoos.
+ * All other copyright for project cactoos-matchers are held by
+ * George Aristy, 2018-2020.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.llorllale.cactoos.matchers;
+
+import org.cactoos.scalar.ScalarOf;
+import org.hamcrest.core.IsNot;
+
+/**
+ * Matcher for Assert that passes.
+ *
+ * @since 1.0.0
+ */
+public final class Passes extends MatcherEnvelope<Assert> {
+    /**
+     * Ctor.
+     */
+    public Passes() {
+        super(
+            new Satisfies<>(
+                new IsNot<>(
+                    new Throws<>(AssertionError.class)
+                ),
+                check -> new ScalarOf<>(
+                    check::affirm, true
+                )
+            )
+        );
+    }
+}
diff --git a/src/test/java/org/llorllale/cactoos/matchers/AssertAllTest.java b/src/test/java/org/llorllale/cactoos/matchers/AssertAllTest.java
new file mode 100644
index 0000000..9bae3ed
--- /dev/null
+++ b/src/test/java/org/llorllale/cactoos/matchers/AssertAllTest.java
@@ -0,0 +1,61 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) for portions of project cactoos-matchers are held by
+ * Yegor Bugayenko, 2017-2018, as part of project cactoos.
+ * All other copyright for project cactoos-matchers are held by
+ * George Aristy, 2018-2020.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.llorllale.cactoos.matchers;
+
+import org.cactoos.iterable.IterableOf;
+import org.hamcrest.core.IsEqual;
+
+/**
+ * Test for {@link AssertAll}.
+ *
+ * @since 1.0.0
+ */
+@SuppressWarnings({"unchecked", "PMD.TestClassWithoutTestCases"})
+final class AssertAllTest extends TestEnvelope {
+    AssertAllTest() {
+        super(
+            new Assertion<>(
+                "assertion must fail if one of assertion fails",
+                new AssertAll(
+                    "must fail on second",
+                    new Assertion<>("must pass", 1, new IsEqual<>(1)),
+                    new Assertion<>("must fail", 1, new IsEqual<>(2))
+                ),
+                new FailsWith("must fail on second: 1) must pass, 2) must fail")
+            ),
+            new Assertion<>(
+                "empty group must pass",
+                new AssertAll(
+                    "must pass for empty iterable",
+                    new IterableOf<>()
+                ),
+                new Passes()
+            )
+        );
+    }
+
+}
diff --git a/src/test/java/org/llorllale/cactoos/matchers/AssertionTest.java b/src/test/java/org/llorllale/cactoos/matchers/AssertionTest.java
index 2660257..d9ccb9d 100644
--- a/src/test/java/org/llorllale/cactoos/matchers/AssertionTest.java
+++ b/src/test/java/org/llorllale/cactoos/matchers/AssertionTest.java
@@ -28,107 +28,82 @@
 
 import java.util.concurrent.atomic.AtomicInteger;
 import org.cactoos.Scalar;
-import org.cactoos.text.Joined;
 import org.cactoos.text.TextOf;
-import org.hamcrest.core.IsEqual;
-import org.junit.jupiter.api.Assertions;
-import org.junit.jupiter.api.Test;
 
 /**
  * Tests for {@link Assertion}.
  * @since 1.0.0
  * @checkstyle ClassDataAbstractionCouplingCheck (500 lines)
  */
-@SuppressWarnings("PMD.AvoidDuplicateLiterals")
-final class AssertionTest {
-    /**
-     * Assertion can be affirmed if the operation being tested matches.
-     */
-    @Test
-    void affirmIfResultMatches() {
-        final String expected = "abc123";
-        new Assertion<>(
-            "must affirm the assertion if the test's result is as expected",
-            new TextOf(expected),
-            new IsText(expected)
-        ).affirm();
-    }
-
-    /**
-     * Assertion must be refuted if the operation being tested does not
-     * match.
-     *
-     * @throws Exception if something goes wrong.
-     */
-    @Test
-    void refuteIfResultDoesNotMatch() throws Exception {
-        Assertions.assertThrows(
-            AssertionError.class,
-            () -> new Assertion<>(
-                "must refute the assertion if the test's result is not as expected",
-                new TextOf("test"),
-                new IsText("no match")
-            ).affirm(),
-            new Joined(
-                System.lineSeparator(),
-                "must refute the assertion if the test's result is not as expected",
-                "Expected: Text with value \"no match\"",
-                " but was: Text is \"test\""
-            ).asString()
-        );
-    }
+@SuppressWarnings({"unchecked", "PMD.AvoidDuplicateLiterals",
+    "PMD.TestClassWithoutTestCases"})
+final class AssertionTest extends TestEnvelope {
 
-    /**
-     * Assertion cannot be affirmed if the operation being tested throws an
-     * unexpected error.
-     */
-    @Test
-    void refuteIfErrorDoesNotMatch() {
-        Assertions.assertThrows(
-            IllegalStateException.class,
-            () -> new Assertion<Scalar<String>>(
-                "must fail if the test throws an unexpected error",
-                () -> {
-                    throw new IllegalStateException();
-                },
-                new HasValue<>("no match")
-            ).affirm()
+    AssertionTest() {
+        super(
+            new Assertion<>(
+                "Assertion can be affirmed if the operation being tested matches.",
+                new Assertion<>(
+                    "must affirm the assertion if the test's result is as expected",
+                    new TextOf("abc123"),
+                    new IsText("abc123")
+                ),
+                new Passes()
+            ),
+            new Assertion<>(
+                "Assertion must be refuted if the operation being tested does not match.",
+                new Assertion<>(
+                    "must refute the assertion if the test's result is not as expected",
+                    new TextOf("test"),
+                    new IsText("no match")
+                ),
+                new FailsWith(
+                    AssertionError.class
+                )
+            ),
+            new Assertion<>(
+                "Must not be affirmed if the operation being tested throws an unexpected error",
+                new Assertion<Scalar<String>>(
+                    "must fail if the test throws an unexpected error",
+                    () -> {
+                        throw new IllegalStateException();
+                    },
+                    new HasValue<>("no match")
+                ),
+                new FailsWith(
+                    IllegalStateException.class
+                )
+            ),
+            new Assertion<>(
+                "Assertion can be affirmed if the operation being tested throws an expected error.",
+                new Assertion<>(
+                    "must affirm the assertion if the test throws the expected error",
+                    () -> {
+                        throw new IllegalStateException("this is a test");
+                    },
+                    new Throws<>("this is a test", IllegalStateException.class)
+                ),
+                new Passes()
+            ),
+            new AssertWith<>(
+                new AtomicInteger(0),
+                quantity -> new AssertAll(
+                    "The scalar within Assertion executed is only once",
+                    new Assertion<>(
+                        "must match the exception",
+                        () -> {
+                            quantity.incrementAndGet();
+                            throw new IllegalStateException("this is a test");
+                        },
+                        new Throws<>("this is a test", IllegalStateException.class)
+                    ),
+                    new Assertion<>(
+                        "must execute scalar only once",
+                        quantity::get,
+                        new HasValue<>(1)
+                    )
+                )
+            )
         );
     }
-
-    /**
-     * Assertion can be affirmed if the operation being tested throws an
-     * expected error.
-     */
-    @Test
-    void affirmIfErrorMatches() {
-        new Assertion<>(
-            "must affirm the assertion if the test throws the expected error",
-            () -> {
-                throw new IllegalStateException("this is a test");
-            },
-            new Throws<>("this is a test", IllegalStateException.class)
-        ).affirm();
-    }
-
-    /**
-     * The scalar within Assertion executed is only once.
-     */
-    @Test
-    void scalarIsExecutedOnce() {
-        final AtomicInteger quantity = new AtomicInteger(0);
-        new Assertion<>(
-            "must match the exception",
-            () -> {
-                quantity.incrementAndGet();
-                throw new IllegalStateException("this is a test");
-            },
-            new Throws<>("this is a test", IllegalStateException.class)
-        ).affirm();
-        new Assertion<>(
-            "must execute scalar only once",
-            quantity.get(),
-            new IsEqual<>(1)
-        ).affirm();
-    }
 }
diff --git a/src/test/java/org/llorllale/cactoos/matchers/TestEnvelope.java b/src/test/java/org/llorllale/cactoos/matchers/TestEnvelope.java
new file mode 100644
index 0000000..60ef18a
--- /dev/null
+++ b/src/test/java/org/llorllale/cactoos/matchers/TestEnvelope.java
@@ -0,0 +1,86 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) for portions of project cactoos-matchers are held by
+ * Yegor Bugayenko, 2017-2018, as part of project cactoos.
+ * All other copyright for project cactoos-matchers are held by
+ * George Aristy, 2018-2020.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.llorllale.cactoos.matchers;
+
+import org.cactoos.iterable.IterableOf;
+import org.cactoos.iterable.Mapped;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.DynamicNode;
+import org.junit.jupiter.api.DynamicTest;
+import org.junit.jupiter.api.TestFactory;
+
+/**
+ * Template for tests.
+ *
+ * @see Assert
+ *
+ * @since 1.0.0
+ */
+@SuppressWarnings({"PMD.TestClassWithoutTestCases",
+    "PMD.AbstractClassWithoutAbstractMethod"})
+public abstract class TestEnvelope {
+    /**
+     * Assertions.
+     */
+    private final Iterable<? extends Assert> checks;
+
+    /**
+     * Ctor.
+     * @param checks Assertions.
+     */
+    protected TestEnvelope(
+        final Assert... checks
+    ) {
+        this(new IterableOf<>(checks));
+    }
+
+    /**
+     * Ctor.
+     * @param checks Assertions.
+     */
+    protected TestEnvelope(
+        final Iterable<? extends Assert> checks
+    ) {
+        this.checks = checks;
+    }
+
+    /**
+     * Test factory.
+     * @return Tests as DynamicNode.
+     */
+    @TestFactory
+    @DisplayName("Tests: ")
+    public final Iterable<DynamicNode> tests() {
+        return new Mapped<>(
+            check -> DynamicTest.dynamicTest(
+                check.description().asString(),
+                check::affirm
+            ),
+            this.checks
+        );
+    }
+}