diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index bd7198e7ab28310de1f0e4b93b55ea29446b4a29..760ef9749c7b4fe37e96c30a2cec87b43aa5dc9f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -99,6 +99,7 @@ test-new-project-template:
 
     - cargo run --all-features -- contract build --manifest-path new_project/Cargo.toml
     - cargo run --all-features -- contract check --manifest-path new_project/Cargo.toml
+    - cargo run --all-features -- contract test --manifest-path new_project/Cargo.toml
     - cd new_project
 
     - cargo check --verbose
diff --git a/README.md b/README.md
index c57dc5a3109aa476ea5a84428f67ccb2a95ad3a1..8c8ee05dbea531e690f02a1a96f3e9dae065cd7e 100644
--- a/README.md
+++ b/README.md
@@ -87,6 +87,9 @@ toolchain of a directory by executing `rustup override set nightly` in it.
 Checks that the code builds as WebAssembly. This command does not output any `<name>.contract`
 artifact to the `target/` directory.
 
+##### `cargo contract test`
+
+Runs test suites defined for a smart contract off-chain.
 
 ## License
 
diff --git a/src/cmd/mod.rs b/src/cmd/mod.rs
index 82e3ac01e97c407c9dc32d3eaa95414a715b3b70..b507a9c5ce70a430bec0fcca886e141c06d4e433 100644
--- a/src/cmd/mod.rs
+++ b/src/cmd/mod.rs
@@ -21,7 +21,11 @@ mod deploy;
 mod instantiate;
 pub mod metadata;
 pub mod new;
+pub mod test;
 
-pub(crate) use self::build::{BuildCommand, CheckCommand};
+pub(crate) use self::{
+    build::{BuildCommand, CheckCommand},
+    test::TestCommand,
+};
 #[cfg(feature = "extrinsics")]
 pub(crate) use self::{deploy::execute_deploy, instantiate::execute_instantiate};
diff --git a/src/cmd/test.rs b/src/cmd/test.rs
new file mode 100644
index 0000000000000000000000000000000000000000..98b9dae139323e2ddd158987e0e30666a75f2072
--- /dev/null
+++ b/src/cmd/test.rs
@@ -0,0 +1,94 @@
+// Copyright 2018-2021 Parity Technologies (UK) Ltd.
+// This file is part of cargo-contract.
+//
+// cargo-contract is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// cargo-contract is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with cargo-contract.  If not, see <http://www.gnu.org/licenses/>.
+
+use crate::{maybe_println, util, workspace::ManifestPath, Verbosity, VerbosityFlags};
+use anyhow::Result;
+use colored::Colorize;
+use std::{convert::TryFrom, path::PathBuf};
+use structopt::StructOpt;
+
+/// Executes smart-contract tests off-chain by delegating to `cargo test`.
+#[derive(Debug, StructOpt)]
+#[structopt(name = "test")]
+pub struct TestCommand {
+    /// Path to the `Cargo.toml` of the contract to test.
+    #[structopt(long, parse(from_os_str))]
+    manifest_path: Option<PathBuf>,
+    #[structopt(flatten)]
+    verbosity: VerbosityFlags,
+}
+
+impl TestCommand {
+    pub fn exec(&self) -> Result<TestResult> {
+        let manifest_path = ManifestPath::try_from(self.manifest_path.as_ref())?;
+        let verbosity = TryFrom::<&VerbosityFlags>::try_from(&self.verbosity)?;
+
+        execute(&manifest_path, verbosity)
+    }
+}
+
+/// Result of the test runs.
+pub struct TestResult {
+    /// The `cargo +nightly test` child process standard output stream buffer.
+    pub stdout: Vec<u8>,
+    /// The verbosity flags.
+    pub verbosity: Verbosity,
+}
+
+impl TestResult {
+    pub fn display(&self) -> Result<String> {
+        Ok(String::from_utf8(self.stdout.clone())?)
+    }
+}
+
+/// Executes `cargo +nightly test`.
+pub(crate) fn execute(manifest_path: &ManifestPath, verbosity: Verbosity) -> Result<TestResult> {
+    util::assert_channel()?;
+
+    maybe_println!(
+        verbosity,
+        " {} {}",
+        format!("[{}/{}]", 1, 1).bold(),
+        "Running tests".bright_green().bold()
+    );
+
+    let stdout = util::invoke_cargo("test", &[""], manifest_path.directory(), verbosity)?;
+
+    Ok(TestResult { stdout, verbosity })
+}
+
+#[cfg(feature = "test-ci-only")]
+#[cfg(test)]
+mod tests_ci_only {
+    use crate::{util::tests::with_new_contract_project, Verbosity};
+    use regex::Regex;
+
+    #[test]
+    fn passing_tests_yield_stdout() {
+        with_new_contract_project(|manifest_path| {
+            let ok_output_pattern =
+                Regex::new(r"test result: ok. \d+ passed; 0 failed; \d+ ignored")
+                    .expect("regex pattern compilation failed");
+
+            let res =
+                super::execute(&manifest_path, Verbosity::Default).expect("test execution failed");
+
+            assert!(ok_output_pattern.is_match(&String::from_utf8_lossy(&res.stdout)));
+
+            Ok(())
+        })
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index 4e4a565db8d552b591eda77479c929b375ddaaf3..a74056b927bf0a637fc95bd52cc8712b6bb9d66a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -22,7 +22,7 @@ mod workspace;
 
 use self::workspace::ManifestPath;
 
-use crate::cmd::{metadata::MetadataResult, BuildCommand, CheckCommand};
+use crate::cmd::{metadata::MetadataResult, BuildCommand, CheckCommand, TestCommand};
 
 #[cfg(feature = "extrinsics")]
 use sp_core::{crypto::Pair, sr25519, H256};
@@ -383,7 +383,7 @@ enum Command {
     Check(CheckCommand),
     /// Test the smart contract off-chain
     #[structopt(name = "test")]
-    Test {},
+    Test(TestCommand),
     /// Upload the smart contract code to the chain
     #[cfg(feature = "extrinsics")]
     #[structopt(name = "deploy")]
@@ -472,7 +472,14 @@ fn exec(cmd: Command) -> Result<Option<String>> {
                 Ok(None)
             }
         }
-        Command::Test {} => Err(anyhow::anyhow!("Command unimplemented")),
+        Command::Test(test) => {
+            let res = test.exec()?;
+            if res.verbosity.is_verbose() {
+                Ok(Some(res.display()?))
+            } else {
+                Ok(None)
+            }
+        }
         #[cfg(feature = "extrinsics")]
         Command::Deploy {
             extrinsic_opts,