diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3aa6c13..82c0be3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -53,6 +53,9 @@ jobs:
           - toolchain: stable
             features: js
             target: wasm32-unknown-unknown
+          - toolchain: '1.46.0'
+            crate_name: oauth1-request-test
+          - crate_name: oauth1-request
     steps:
       - uses: actions/checkout@v2
       - name: Install Rust toolchain
@@ -85,18 +88,18 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: clippy
-          args: --verbose --tests --manifest-path oauth1-request/Cargo.toml --no-default-features '--features=${{ matrix.features }}'
+          args: --verbose --tests --manifest-path ${{ matrix.crate_name }}/Cargo.toml --no-default-features '--features=${{ matrix.features }}'
       - name: Check docs of `oauth1-request`
         if: matrix.features == 'js,derive'
         uses: actions-rs/cargo@v1
         with:
           command: doc
-          args: --verbose --manifest-path oauth1-request/Cargo.toml --no-default-features '--features=${{ matrix.features }}' --no-deps
+          args: --verbose --manifest-path ${{ matrix.crate_name }}/Cargo.toml --no-default-features '--features=${{ matrix.features }}' --no-deps
       - name: Build `oauth1-request`
         uses: actions-rs/cargo@v1
         with:
           command: build
-          args: --verbose --tests --manifest-path oauth1-request/Cargo.toml --no-default-features '--features=${{ matrix.features }}'
+          args: --verbose --tests --manifest-path ${{ matrix.crate_name }}/Cargo.toml --no-default-features '--features=${{ matrix.features }}'
       - name: Build `examples`
         if: ${{ matrix.target == '' && matrix.toolchain != '1.46.0' }}
         uses: actions-rs/cargo@v1
@@ -104,10 +107,11 @@ jobs:
           command: build
           args: --verbose --manifest-path examples/Cargo.toml
       - name: Test `oauth1-request`
+        if: ${{ matrix.target == '' && matrix.toolchain != '1.46.0' }}
         uses: actions-rs/cargo@v1
         with:
           command: test
-          args: --manifest-path oauth1-request/Cargo.toml --no-default-features '--features=${{ matrix.features }}'
+          args: --manifest-path ${{ matrix.crate_name }}/Cargo.toml --no-default-features '--features=${{ matrix.features }}'
   derive-test:
     name: Test `oauth1-request-derive`
     runs-on: ubuntu-latest
diff --git a/oauth1-request-test/Cargo.toml b/oauth1-request-test/Cargo.toml
new file mode 100644
index 0000000..b6a543a
--- /dev/null
+++ b/oauth1-request-test/Cargo.toml
@@ -0,0 +1,21 @@
+[package]
+name = "oauth-credentials-test"
+version = "0.0.0"
+authors = ["Daiki Mizukami <tesaguriguma@gmail.com>"]
+description = "A hack to make the CI work with older toolchains."
+publish = false
+
+[dependencies]
+oauth1-request = { path = "../oauth1-request", default-features = false }
+
+[features]
+default = ["derive", "hmac-sha1", "std"]
+alloc = ["oauth1-request/alloc"]
+derive = ["oauth1-request/derive"]
+hmac-sha1 = ["oauth1-request/hmac-sha1"]
+rsa-sha1-06 = ["oauth1-request/rsa-sha1-06"]
+rsa-sha1-09 = ["oauth1-request/rsa-sha1-09"]
+js = ["oauth1-request/js"]
+serde = ["oauth1-request/serde"]
+std = ["oauth1-request/std"]
+test = ["oauth1-request/test"]
diff --git a/oauth1-request-test/src/lib.rs b/oauth1-request-test/src/lib.rs
new file mode 100644
index 0000000..6a8b45c
--- /dev/null
+++ b/oauth1-request-test/src/lib.rs
@@ -0,0 +1 @@
+pub use oauth_request::*;