diff --git a/.azure-pipelines.yml b/.azure-pipelines.yml
index fbaf9c9d..f9904f74 100644
--- a/.azure-pipelines.yml
+++ b/.azure-pipelines.yml
@@ -34,5 +34,5 @@ stages:
             displayName: Install rust
           - script: cargo test --no-default-features --features "std cargo" -p clap:3.0.0-beta.2
             displayName: Test with almost no features
-          - script: cargo test --features "yaml unstable"
+          - script: cargo test --features "yaml"
             displayName: Test with most features
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3edc250b..8782d879 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -76,7 +76,9 @@ jobs:
         uses: actions/checkout@v2
       - name: Install linker
         if: matrix.target == 'i686-unknown-linux-gnu'
-        run: sudo apt-get install gcc-multilib
+        run: |
+          sudo apt-get update
+          sudo apt-get install gcc-multilib
       - name: Test almost no features
         uses: actions-rs/cargo@v1
         if: matrix.features == 'none'
@@ -88,19 +90,19 @@ jobs:
         if: matrix.features == 'all'
         with:
           command: test
-          args: --target ${{ matrix.target }} --features "wrap_help yaml regex unstable"
+          args: --target ${{ matrix.target }} --features "wrap_help yaml regex"
       - name: Check debug statement
         uses: actions-rs/cargo@v1
         if: matrix.features == 'all'
         with:
           command: check
-          args: --target ${{ matrix.target }} --features "wrap_help yaml regex unstable debug"
+          args: --target ${{ matrix.target }} --features "wrap_help yaml regex debug"
       - name: Test release
         uses: actions-rs/cargo@v1
         if: matrix.features == 'release'
         with:
           command: test
-          args: --target ${{ matrix.target }} --features "wrap_help yaml regex unstable" --release
+          args: --target ${{ matrix.target }} --features "wrap_help yaml regex" --release
   nightly:
     name: Nightly Tests
     needs: [prepare]
@@ -123,7 +125,7 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: test
-          args: --features "wrap_help yaml regex unstable"
+          args: --features "wrap_help yaml regex"
   wasm:
     name: Wasm Check
     needs: [prepare]
@@ -145,7 +147,7 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: check
-          args: --target ${{ matrix.target }} --features "yaml regex unstable"
+          args: --target ${{ matrix.target }} --features "yaml regex"
   lint:
     name: Linting (fmt + clippy)
     needs: [prepare]
@@ -169,7 +171,7 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: clippy
-          args: --features "wrap_help yaml regex unstable" -- -D warnings
+          args: --features "wrap_help yaml regex" -- -D warnings
       - name: Format check
         uses: actions-rs/cargo@v1
         with:
@@ -199,7 +201,7 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: tarpaulin
-          args: --features "wrap_help yaml regex unstable" --timeout 300 --out Lcov --output-dir coverage
+          args: --features "wrap_help yaml regex" --timeout 300 --out Lcov --output-dir coverage
       - name: Coveralls
         uses: coverallsapp/github-action@master
         with:
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index f8038875..fa1d5269 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -9,7 +9,7 @@ Another really great way to help is if you find an interesting, or helpful way i
 To test with all features both enabled and disabled, you can run these commands:
 
 ```sh
-$ cargo test --features "wrap_help yaml regex unstable"
+$ cargo test --features "wrap_help yaml regex"
 ```
 
 Alternatively, if you have [`just`](https://github.com/casey/just) installed you can run the prebuilt recipes. *Not* using `just` is perfectly fine as well, it simply bundles commands automatically.
@@ -39,7 +39,7 @@ During the CI process `clap` runs against many different lints using [`clippy`](
 In order to check the code for lints and to format it run either:
 
 ```sh
-$ cargo clippy --features "wrap_help yaml regex unstable" -- -D warnings
+$ cargo clippy --features "wrap_help yaml regex" -- -D warnings
 $ cargo fmt -- --check
 
 # Or
@@ -84,7 +84,7 @@ I use a [conventional](https://github.com/ajoslin/conventional-changelog/blob/a5
 ### Tests and Documentation
 
 1. Create tests for your changes
-2. **Ensure the tests are passing.** Run the tests (`cargo test --features "yaml unstable"`), alternatively `just run-tests` if you have `just` installed.
+2. **Ensure the tests are passing.** Run the tests (`cargo test --features "yaml"`), alternatively `just run-tests` if you have `just` installed.
 3. **Optional** Run the lints (`cargo build --features lints`) (requires a nightly compiler), alternatively `just lint`
 4. Ensure your changes contain documentation if adding new APIs or features.
 
diff --git a/Cargo.toml b/Cargo.toml
index 10f1567b..e7d5e3ab 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -95,7 +95,6 @@ unicode_help= ["textwrap/unicode-width"]  # Enable if any unicode in help messag
 derive      = ["clap_derive", "lazy_static"]
 yaml        = ["yaml-rust"]
 cargo       = ["lazy_static"] # Disable if you're not using Cargo, enables Cargo-env-var-dependent macros
-unstable    = ["clap_derive/unstable"] # for building with unstable clap features (doesn't require nightly Rust) (currently none)
 debug       = ["clap_derive/debug"] # Enables debug messages
 doc         = ["yaml", "regex"] # All the features which add to documentation
 
diff --git a/README.md b/README.md
index 1fc89de5..4e975d2a 100644
--- a/README.md
+++ b/README.md
@@ -491,7 +491,6 @@ features = [ "suggestions", "color" ]
 * **"wrap_help"**: Turns on the help text wrapping feature, based on the terminal size. (builds dependency `term-size`)
 * **"yaml"**: Enables building CLIs from YAML documents. (builds dependency `yaml-rust`)
 * **"regex"**: Enables regex validators. (builds dependency `regex`)
-* **"unstable"**: Enables unstable `clap` features that may change from release to release
 
 ### More Information
 
diff --git a/clap_derive/Cargo.toml b/clap_derive/Cargo.toml
index 191560f3..6fdca3d5 100644
--- a/clap_derive/Cargo.toml
+++ b/clap_derive/Cargo.toml
@@ -51,7 +51,6 @@ version-sync = "0.9"
 
 [features]
 default = []
-unstable = []
 debug = []
 doc = []
 
diff --git a/clap_generate/Cargo.toml b/clap_generate/Cargo.toml
index 8497ab5c..40376ea1 100644
--- a/clap_generate/Cargo.toml
+++ b/clap_generate/Cargo.toml
@@ -43,7 +43,6 @@ version-sync = "0.9"
 
 [features]
 default = []
-unstable = ["clap/unstable"]
 debug = ["clap/debug"]
 doc = []
 
diff --git a/justfile b/justfile
index 0ab5459d..a7da142f 100644
--- a/justfile
+++ b/justfile
@@ -5,7 +5,7 @@ debug TESTG TEST="":
 	cargo test --test {{TESTG}} --features debug -- {{TEST}}
 
 run-tests:
-	cargo test --features "wrap_help yaml regex unstable"
+	cargo test --features "wrap_help yaml regex"
 
 @bench:
 	cargo bench
@@ -13,7 +13,7 @@ run-tests:
 @lint:
 	rustup component add clippy
 	rustup component add rustfmt
-	cargo clippy --features "wrap_help yaml regex unstable" -- -D warnings
+	cargo clippy --features "wrap_help yaml regex" -- -D warnings
 	cargo fmt -- --check
 
 clean:
diff --git a/tests/examples.rs b/tests/examples.rs
index 2c080256..b9aa0857 100644
--- a/tests/examples.rs
+++ b/tests/examples.rs
@@ -10,7 +10,7 @@ fn run_example<S: AsRef<str>>(name: S, args: &[&str]) -> Output {
         "--example",
         name.as_ref(),
         "--features",
-        "yaml unstable",
+        "yaml",
         "--",
     ];
     all_args.extend_from_slice(args);