diff --git a/.rustup.sh b/.rustup.sh
deleted file mode 100755
index 18b5216..0000000
--- a/.rustup.sh
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/sh
-# Use rustup to locally run the same suite of tests as .travis.yml.
-# (You should first install/update 1.0.0, beta, and nightly.)
-
-set -ex
-
-for toolchain in 1.0.0 beta nightly; do
-    run="rustup run $toolchain"
-    $run cargo build --verbose
-    $run /usr/bin/env make test
-    $run $PWD/.travis/test_features.sh
-    if [ $toolchain = nightly ]; then
-        $run $PWD/.travis/test_nightly.sh
-    fi
-    $run cargo doc
-done
diff --git a/.travis.yml b/.travis.yml
index 80df3af..af0cca8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,21 +1,19 @@
 language: rust
 rust:
-  - 1.0.0
+  - 1.8.0
+  - 1.15.0
   - beta
   - nightly
 sudo: false
 script:
   - cargo build --verbose
-  - make test
-  - .travis/test_features.sh
-  - |
-    [ $TRAVIS_RUST_VERSION != nightly ] || .travis/test_nightly.sh
+  - ./ci/test_full.sh
   - cargo doc
 after_success: |
   [ $TRAVIS_BRANCH = master ] &&
   [ $TRAVIS_PULL_REQUEST = false ] &&
   [ $TRAVIS_RUST_VERSION = nightly ] &&
-  ssh-agent .travis/deploy.sh
+  ssh-agent ./ci/deploy.sh
 notifications:
   email:
     on_success: never
diff --git a/.travis/test_features.sh b/.travis/test_features.sh
deleted file mode 100755
index 109fd50..0000000
--- a/.travis/test_features.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/sh
-
-set -ex
-
-for feature in '' bigint rational complex; do
-  cargo build --verbose --no-default-features --features="$feature"
-done
diff --git a/.travis/test_nightly.sh b/.travis/test_nightly.sh
deleted file mode 100755
index 7ed93dd..0000000
--- a/.travis/test_nightly.sh
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/bin/sh
-
-set -ex
-
-cargo bench --verbose
-
-cargo test --verbose --manifest-path=macros/Cargo.toml
-cargo test --verbose --manifest-path=derive/Cargo.toml
-
-# Build test for the serde feature
-cargo build --verbose --features "serde"
-
-# Downgrade serde and build test the 0.7.0 channel as well
-cargo update -p serde --precise 0.7.0
-cargo build --verbose --features "serde"
diff --git a/Makefile b/Makefile
deleted file mode 100644
index bce28aa..0000000
--- a/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-CARGO_CMD ?= cargo
-
-packages = bigint complex integer iter rational traits
-
-test:
-	$(MAKE) run-all TASK="test"
-
-run-all: $(packages)
-	$(CARGO_CMD) $(TASK)
-
-$(packages):
-	$(CARGO_CMD) $(TASK) --manifest-path $@/Cargo.toml
-
-.PHONY: $(packages) test
diff --git a/README.md b/README.md
index e615cce..e9a7489 100644
--- a/README.md
+++ b/README.md
@@ -22,3 +22,9 @@ and this to your crate root:
 ```rust
 extern crate num;
 ```
+
+## Compatibility
+
+Most of the `num` crates are tested for rustc 1.8 and greater.
+The exceptions are `num-derive` which requires at least rustc 1.15,
+and the deprecated `num-macros` which requires nightly rustc.
diff --git a/.travis/.gitignore b/ci/.gitignore
similarity index 100%
rename from .travis/.gitignore
rename to ci/.gitignore
diff --git a/.travis/deploy.enc b/ci/deploy.enc
similarity index 100%
rename from .travis/deploy.enc
rename to ci/deploy.enc
diff --git a/.travis/deploy.sh b/ci/deploy.sh
similarity index 68%
rename from .travis/deploy.sh
rename to ci/deploy.sh
index c342036..02372e2 100755
--- a/.travis/deploy.sh
+++ b/ci/deploy.sh
@@ -6,7 +6,7 @@ cp doc/* target/doc/
 pip install ghp-import --user
 $HOME/.local/bin/ghp-import -n target/doc
 
-openssl aes-256-cbc -K $encrypted_9e86330b283d_key -iv $encrypted_9e86330b283d_iv -in .travis/deploy.enc -out .travis/deploy -d
-chmod 600 .travis/deploy
-ssh-add .travis/deploy
+openssl aes-256-cbc -K $encrypted_9e86330b283d_key -iv $encrypted_9e86330b283d_iv -in ./ci/deploy.enc -out ./ci/deploy -d
+chmod 600 ./ci/deploy
+ssh-add ./ci/deploy
 git push -qf ssh://git@github.com/${TRAVIS_REPO_SLUG}.git gh-pages
diff --git a/ci/rustup.sh b/ci/rustup.sh
new file mode 100755
index 0000000..f263dd8
--- /dev/null
+++ b/ci/rustup.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+# Use rustup to locally run the same suite of tests as .travis.yml.
+# (You should first install/update 1.8.0, 1.15.0, beta, and nightly.)
+
+set -ex
+
+for toolchain in 1.8.0 1.15.0 beta nightly; do
+    run="rustup run $toolchain"
+    $run cargo build --verbose
+    $run $PWD/ci/test_full.sh $toolchain
+    $run cargo doc
+done
diff --git a/ci/test_full.sh b/ci/test_full.sh
new file mode 100755
index 0000000..b750b71
--- /dev/null
+++ b/ci/test_full.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+
+set -ex
+
+echo Testing num on rustc ${TRAVIS_RUST_VERSION:=$1}
+
+# All of these packages should build and test everywhere.
+for package in bigint complex integer iter rational traits; do
+  cargo build --manifest-path $package/Cargo.toml
+  cargo test --manifest-path $package/Cargo.toml
+done
+
+# Each isolated feature should also work everywhere.
+for feature in '' bigint rational complex; do
+  cargo build --verbose --no-default-features --features="$feature"
+  cargo test --verbose --no-default-features --features="$feature"
+done
+
+# Build test for the serde feature
+cargo build --verbose --features "serde"
+
+# Downgrade serde and build test the 0.7.0 channel as well
+cargo update -p serde --precise 0.7.0
+cargo build --verbose --features "serde"
+
+
+if [ "$TRAVIS_RUST_VERSION" = 1.8.0 ]; then exit; fi
+
+# num-derive should build on 1.15.0+
+cargo build --verbose --manifest-path=derive/Cargo.toml
+
+
+if [ "$TRAVIS_RUST_VERSION" != nightly ]; then exit; fi
+
+# num-derive testing requires compiletest_rs, which requires nightly
+cargo test --verbose --manifest-path=derive/Cargo.toml
+
+# num-macros only works on nightly, soon to be deprecated
+cargo build --verbose --manifest-path=macros/Cargo.toml
+cargo test --verbose --manifest-path=macros/Cargo.toml
+
+# benchmarks only work on nightly
+cargo bench --verbose