diff --git a/.appveyor.yml b/.appveyor.yml
deleted file mode 100644
index 4f4596a7..00000000
--- a/.appveyor.yml
+++ /dev/null
@@ -1,45 +0,0 @@
-platform:
-  - x64
-
-branches:
-  only:
-    - main
-
-environment:
-  matrix:
-    - PYVER: 38
-    - PYVER: 37
-    - PYVER: 36
-
-install:
-    # If there is a newer build queued for the same PR, cancel this one.
-    - cmd: >
-        .gen_ci_support\\ff_ci_pr_build.py -v
-        --ci "appveyor"
-        "%APPVEYOR_ACCOUNT_NAME%/%APPVEYOR_PROJECT_SLUG%"
-        "%APPVEYOR_BUILD_NUMBER%"
-        "%APPVEYOR_PULL_REQUEST_NUMBER%"
-
-    # Install Miniconda.
-    - cmd: call .appveyor_support\\install_miniconda.bat
-
-    # Create the test environment.
-    - cmd: set "CONDA_ENV_TYPE=tst_py%PYVER%"
-    - cmd: call .appveyor_support\\create_env.bat
-
-    # Install the package and dependencies.
-    - cmd: pip install -e .
-
-# Skip .NET project specific build phase.
-build: off
-
-# Run tests and measure test coverage.
-test_script:
-    - cmd: coverage erase
-    - cmd: coverage run --source . setup.py test
-    - cmd: coverage report -m
-
-on_success:
-    - cmd: set "CONDA_ENV_TYPE=dpl"
-    - cmd: .appveyor_support\\create_env.bat
-    - cmd: coveralls || exit 0
diff --git a/.appveyor_support/create_env.bat b/.appveyor_support/create_env.bat
deleted file mode 100755
index 5ee1c0a0..00000000
--- a/.appveyor_support/create_env.bat
+++ /dev/null
@@ -1,31 +0,0 @@
-:: Show each command and output
-@echo on
-
-:: Check CONDA_ENV_TYPE was set.
-if "$%CONDA_ENV_TYPE%" == "" (
-    echo "Set $CONDA_ENV_TYPE externally."
-    exit 1
-)
-
-:: Activate conda.
-call "%MINICONDA_DIR%\Scripts\activate.bat"
-if errorlevel 1 exit 1
-
-:: Create a temporary directory for the environment.
-python -c "import tempfile; print(tempfile.mkdtemp())" > tmp_dir.txt
-if errorlevel 1 exit 1
-set /p CONDA_ENV_PREFIX=<tmp_dir.txt
-if errorlevel 1 exit 1
-del tmp_dir.txt
-if errorlevel 1 exit 1
-set "CONDA_ENV_PATH=%CONDA_ENV_PREFIX%\%CONDA_ENV_TYPE%"
-set "SCRIPT_DIR=%~dp0"
-set "CONDA_ENV_SPEC=%SCRIPT_DIR%\environments\%CONDA_ENV_TYPE%.yml"
-
-:: Fill the temporary directory.
-call "%MINICONDA_DIR%\Scripts\activate.bat"
-if errorlevel 1 exit 1
-conda.exe env create -p "%CONDA_ENV_PATH%" -f "%CONDA_ENV_SPEC%"
-if errorlevel 1 exit 1
-call "%MINICONDA_DIR%\Scripts\activate.bat" "%CONDA_ENV_PATH%"
-if errorlevel 1 exit 1
diff --git a/.appveyor_support/environments/dpl.yml b/.appveyor_support/environments/dpl.yml
deleted file mode 100644
index 470a674d..00000000
--- a/.appveyor_support/environments/dpl.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-name: dask_image_dpl_env
-
-channels:
-  - conda-forge
-
-dependencies:
-  - python=3.6.*
-  - pip==18.0
-  - wheel==0.31.1
-  - coverage==4.5.1
-  - coveralls==1.3.0
diff --git a/.appveyor_support/install_miniconda.bat b/.appveyor_support/install_miniconda.bat
deleted file mode 100755
index 43039d6e..00000000
--- a/.appveyor_support/install_miniconda.bat
+++ /dev/null
@@ -1,49 +0,0 @@
-:: Configure batch
-@echo on
-
-:: Miniconda Config:
-set "MINICONDA_VERSION=4.8.2"
-set "MINICONDA_MD5=20d6bd9b3bd62f1fd874315b6b38c159"
-set "MINICONDA_INSTALLER=%USERPROFILE%\miniconda.exe"
-set "MINICONDA_DIR=%USERPROFILE%\miniconda"
-set "MINICONDA_URL=https://repo.anaconda.com/miniconda/Miniconda3-py37_%MINICONDA_VERSION%-Windows-x86_64.exe"
-
-:: Install Miniconda.
-powershell -Command "(New-Object Net.WebClient).DownloadFile('%MINICONDA_URL%', '%MINICONDA_INSTALLER%')"
-if errorlevel 1 exit 1
-( certutil -hashfile "%MINICONDA_INSTALLER%" md5 | findstr /v ":" ) > "%MINICONDA_INSTALLER%.md5"
-if errorlevel 1 exit 1
-type "%MINICONDA_INSTALLER%.md5"
-if errorlevel 1 exit 1
-set /p MINICONDA_MD5_FOUND=<%MINICONDA_INSTALLER%.md5
-if errorlevel 1 exit 1
-set "MINICONDA_MD5_FOUND=%MINICONDA_MD5_FOUND: =%"
-if errorlevel 1 exit 1
-echo "%MINICONDA_MD5_FOUND%" | findstr /c:"%MINICONDA_MD5%"
-if errorlevel 1 exit 1
-start /wait "" %MINICONDA_INSTALLER% /InstallationType=JustMe    ^
-                                     /AddToPath=0                ^
-                                     /RegisterPython=0           ^
-                                     /S                          ^
-                                     /D=%MINICONDA_DIR%
-if errorlevel 1 exit 1
-del "%MINICONDA_INSTALLER%"
-if errorlevel 1 exit 1
-del "%MINICONDA_INSTALLER%.md5"
-if errorlevel 1 exit 1
-
-:: Activate conda.
-call "%MINICONDA_DIR%\Scripts\activate.bat"
-if errorlevel 1 exit 1
-
-:: Configure conda.
-conda.exe config --set show_channel_urls true
-if errorlevel 1 exit 1
-conda.exe config --set auto_update_conda false
-if errorlevel 1 exit 1
-conda.exe config --set add_pip_as_python_dependency true
-if errorlevel 1 exit 1
-
-:: Patch VS 2008 for 64-bit support.
-conda.exe install --quiet --yes "conda-forge::vs2008_express_vc_python_patch"
-call setup_x64
diff --git a/.circleci/checkout_merge_commit.sh b/.circleci/checkout_merge_commit.sh
deleted file mode 100755
index 9528e4b3..00000000
--- a/.circleci/checkout_merge_commit.sh
+++ /dev/null
@@ -1,27 +0,0 @@
-#!/bin/bash
-
-
-# Update PR refs for testing.
-if [[ -n "${CIRCLE_PR_NUMBER}" ]]
-then
-    FETCH_REFS="${FETCH_REFS} +refs/pull/${CIRCLE_PR_NUMBER}/head:pr/${CIRCLE_PR_NUMBER}/head"
-    FETCH_REFS="${FETCH_REFS} +refs/pull/${CIRCLE_PR_NUMBER}/merge:pr/${CIRCLE_PR_NUMBER}/merge"
-fi
-
-# Retrieve the refs.
-if [[ -n "${CIRCLE_PR_NUMBER}" ]]
-then
-    git fetch -u origin ${FETCH_REFS}
-fi
-
-# Checkout the PR merge ref.
-if [[ -n "${CIRCLE_PR_NUMBER}" ]]
-then
-    git checkout -qf "pr/${CIRCLE_PR_NUMBER}/merge"
-fi
-
-# Check for merge conflicts.
-if [[ -n "${CIRCLE_PR_NUMBER}" ]]
-then
-    git branch --merged | grep "pr/${CIRCLE_PR_NUMBER}/head" > /dev/null
-fi
diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 62f7021a..00000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,142 +0,0 @@
-version: 2
-
-jobs:
-  build_py38:
-    working_directory: ~/test
-    machine: true
-    environment:
-      - PYVER: "38"
-    steps:
-      - checkout
-      - run:
-          name: Fast finish outdated PRs and merge PRs
-          command: |
-            ./.circleci/fast_finish_ci_pr_build.sh
-            ./.circleci/checkout_merge_commit.sh
-      - run:
-          name: Install and Configure Miniconda
-          command: |
-            source .circleci/install_miniconda.sh
-            echo "MINICONDA_DIR=${MINICONDA_DIR}" >> "${BASH_ENV}"
-      - run:
-          name: Create the test environment
-          command: |
-            export CONDA_ENV_TYPE="tst_py${PYVER}"
-            source .circleci/create_env.sh
-            echo "CONDA_ENV_PATH=${CONDA_ENV_PATH}" >> "${BASH_ENV}"
-      - run:
-          name: Install the package and dependencies
-          command: |
-            source "${MINICONDA_DIR}/etc/profile.d/conda.sh"
-            conda activate "${CONDA_ENV_PATH}"
-            pip install -e .
-      - run:
-          name: Run tests and measure test coverage
-          command: |
-            source "${MINICONDA_DIR}/etc/profile.d/conda.sh"
-            conda activate "${CONDA_ENV_PATH}"
-            coverage erase
-            coverage run --source . setup.py test
-            coverage report -m
-      - run:
-          name: Report coverage
-          command: |
-            export CONDA_ENV_TYPE="dpl"
-            source .circleci/create_env.sh
-            coveralls
-
-  build_py37:
-    working_directory: ~/test
-    machine: true
-    environment:
-      - PYVER: "37"
-    steps:
-      - checkout
-      - run:
-          name: Fast finish outdated PRs and merge PRs
-          command: |
-            ./.circleci/fast_finish_ci_pr_build.sh
-            ./.circleci/checkout_merge_commit.sh
-      - run:
-          name: Install and Configure Miniconda
-          command: |
-            source .circleci/install_miniconda.sh
-            echo "MINICONDA_DIR=${MINICONDA_DIR}" >> "${BASH_ENV}"
-      - run:
-          name: Create the test environment
-          command: |
-            export CONDA_ENV_TYPE="tst_py${PYVER}"
-            source .circleci/create_env.sh
-            echo "CONDA_ENV_PATH=${CONDA_ENV_PATH}" >> "${BASH_ENV}"
-      - run:
-          name: Install the package and dependencies
-          command: |
-            source "${MINICONDA_DIR}/etc/profile.d/conda.sh"
-            conda activate "${CONDA_ENV_PATH}"
-            pip install -e .
-      - run:
-          name: Run tests and measure test coverage
-          command: |
-            source "${MINICONDA_DIR}/etc/profile.d/conda.sh"
-            conda activate "${CONDA_ENV_PATH}"
-            coverage erase
-            coverage run --source . setup.py test
-            coverage report -m
-      - run:
-          name: Report coverage
-          command: |
-            export CONDA_ENV_TYPE="dpl"
-            source .circleci/create_env.sh
-            coveralls
-
-  build_py36:
-    working_directory: ~/test
-    machine: true
-    environment:
-      - PYVER: "36"
-    steps:
-      - checkout
-      - run:
-          name: Fast finish outdated PRs and merge PRs
-          command: |
-            ./.circleci/fast_finish_ci_pr_build.sh
-            ./.circleci/checkout_merge_commit.sh
-      - run:
-          name: Install and Configure Miniconda
-          command: |
-            source .circleci/install_miniconda.sh
-            echo "MINICONDA_DIR=${MINICONDA_DIR}" >> "${BASH_ENV}"
-      - run:
-          name: Create the test environment
-          command: |
-            export CONDA_ENV_TYPE="tst_py${PYVER}"
-            source .circleci/create_env.sh
-            echo "CONDA_ENV_PATH=${CONDA_ENV_PATH}" >> "${BASH_ENV}"
-      - run:
-          name: Install the package and dependencies
-          command: |
-            source "${MINICONDA_DIR}/etc/profile.d/conda.sh"
-            conda activate "${CONDA_ENV_PATH}"
-            pip install -e .
-      - run:
-          name: Run tests and measure test coverage
-          command: |
-            source "${MINICONDA_DIR}/etc/profile.d/conda.sh"
-            conda activate "${CONDA_ENV_PATH}"
-            coverage erase
-            coverage run --source . setup.py test
-            coverage report -m
-      - run:
-          name: Report coverage
-          command: |
-            export CONDA_ENV_TYPE="dpl"
-            source .circleci/create_env.sh
-            coveralls
-
-workflows:
-  version: 2
-  build_and_test:
-    jobs:
-      - build_py38
-      - build_py37
-      - build_py36
diff --git a/.circleci/create_env.sh b/.circleci/create_env.sh
deleted file mode 100644
index 2f061ebc..00000000
--- a/.circleci/create_env.sh
+++ /dev/null
@@ -1,27 +0,0 @@
-#!/bin/bash -l
-
-# Some reasonable bash constraints.
-set -xeuo pipefail
-
-# Check CONDA_ENV_TYPE was set.
-if [ -z "${CONDA_ENV_TYPE}" ]; then
-    echo "Set $CONDA_ENV_TYPE externally."
-    exit 1
-fi
-
-# Activate conda.
-source "${MINICONDA_DIR}/etc/profile.d/conda.sh"
-conda activate
-
-# Create a temporary directory for the environment.
-export SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-export CONDA_ENV_PREFIX="$(python -c 'import tempfile; print(tempfile.mkdtemp())')"
-export CONDA_ENV_PATH="${CONDA_ENV_PREFIX}/${CONDA_ENV_TYPE}"
-export CONDA_ENV_SPEC="${SCRIPT_DIR}/environments/${CONDA_ENV_TYPE}.yml"
-
-# Fill the temporary directory.
-conda env create -p "${CONDA_ENV_PATH}" -f "${CONDA_ENV_SPEC}"
-conda activate "${CONDA_ENV_PATH}"
-
-# Unset all bash constraints.
-set +xeuo pipefail
diff --git a/.circleci/environments/dpl.yml b/.circleci/environments/dpl.yml
deleted file mode 100644
index 470a674d..00000000
--- a/.circleci/environments/dpl.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-name: dask_image_dpl_env
-
-channels:
-  - conda-forge
-
-dependencies:
-  - python=3.6.*
-  - pip==18.0
-  - wheel==0.31.1
-  - coverage==4.5.1
-  - coveralls==1.3.0
diff --git a/.circleci/environments/tst_py36.yml b/.circleci/environments/tst_py36.yml
deleted file mode 100644
index 34c69b6d..00000000
--- a/.circleci/environments/tst_py36.yml
+++ /dev/null
@@ -1,21 +0,0 @@
-name: dask_image_py36_env
-
-channels:
-  - conda-forge
-
-dependencies:
-  - python=3.6.*
-  - pip==19.0.1
-  - wheel==0.32.3
-  - coverage==4.5.2
-  - flake8==3.7.2
-  - pytest==5.2.0
-  - pytest-flake8==1.0.4
-  - dask==2.8.1
-  - numpy==1.16.0
-  - scipy==1.2.0
-  - scikit-image==0.14.2
-  - pims==0.4.1
-  - slicerator==0.9.8
-  - pip:
-    - slicerator==0.9.8
diff --git a/.circleci/environments/tst_py37.yml b/.circleci/environments/tst_py37.yml
deleted file mode 100644
index 07066d9e..00000000
--- a/.circleci/environments/tst_py37.yml
+++ /dev/null
@@ -1,21 +0,0 @@
-name: dask_image_py37_env
-
-channels:
-  - conda-forge
-
-dependencies:
-  - python=3.7.*
-  - pip==19.0.1
-  - wheel==0.32.3
-  - coverage==4.5.2
-  - flake8==3.7.2
-  - pytest==5.2.0
-  - pytest-flake8==1.0.4
-  - dask==2.8.1
-  - numpy==1.16.0
-  - scipy==1.2.0
-  - scikit-image==0.14.2
-  - pims==0.4.1
-  - slicerator==0.9.8
-  - pip:
-    - slicerator==0.9.8
diff --git a/.circleci/fast_finish_ci_pr_build.sh b/.circleci/fast_finish_ci_pr_build.sh
deleted file mode 100755
index 9aed092c..00000000
--- a/.circleci/fast_finish_ci_pr_build.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/bash
-
-python .gen_ci_support/ff_ci_pr_build.py -v \
-	--ci "circle" \
-	"${CIRCLE_PROJECT_USERNAME}/${CIRCLE_PROJECT_REPONAME}" \
-	"${CIRCLE_BUILD_NUM}" \
-	"${CIRCLE_PR_NUMBER}"
diff --git a/.circleci/install_miniconda.sh b/.circleci/install_miniconda.sh
deleted file mode 100755
index d7e1b85f..00000000
--- a/.circleci/install_miniconda.sh
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/bin/bash
-
-# Some reasonable bash constraints.
-set -xeuo pipefail
-
-# Miniconda Config:
-export MINICONDA_VERSION="4.8.2"
-export MINICONDA_MD5="87e77f097f6ebb5127c77662dfc3165e"
-export MINICONDA_INSTALLER="${HOME}/miniconda.sh"
-export MINICONDA_DIR="${HOME}/miniconda"
-export MINICONDA_URL="https://repo.continuum.io/miniconda/Miniconda3-py37_${MINICONDA_VERSION}-Linux-x86_64.sh"
-
-# Install Miniconda.
-curl -L "${MINICONDA_URL}" > "${MINICONDA_INSTALLER}"
-openssl md5 "${MINICONDA_INSTALLER}" | grep "${MINICONDA_MD5}"
-bash "${MINICONDA_INSTALLER}" -b -p "${MINICONDA_DIR}"
-rm -f "${MINICONDA_INSTALLER}"
-
-# Activate conda.
-source "${MINICONDA_DIR}/etc/profile.d/conda.sh"
-conda activate
-
-# Configure conda.
-conda config --set show_channel_urls true
-conda config --set auto_update_conda false
-conda config --set add_pip_as_python_dependency true
-
-# Unset all bash constraints.
-set +xeuo pipefail
diff --git a/.coveragerc b/.coveragerc
index 90ae2bc8..5f05b1d2 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -22,7 +22,6 @@ omit =
     */eggs/*
     */.eggs/*
     *tests/*
-    */travis_pypi_setup.py
     */versioneer.py
     */_version.py
     */_vendor/*
diff --git a/.gen_ci_support/ff_ci_pr_build.py b/.gen_ci_support/ff_ci_pr_build.py
deleted file mode 100755
index 10d7d277..00000000
--- a/.gen_ci_support/ff_ci_pr_build.py
+++ /dev/null
@@ -1,192 +0,0 @@
-#!/usr/bin/env python
-
-"""
-Fast finish old PR builds on CIs
-
-Using various CI's (CircleCI, Travis CI, and AppVeyor) APIs and information
-about the current build for the relevant CI, this script checks to see if the
-current PR build is the most recent one. It does this by comparing the current
-PR build's build number to other build numbers of builds for this PR. If it is
-not the most recent build for the PR, then this script exits with a failure.
-Thus it can fail the build; stopping it from proceeding further. However, if
-it is the most recent build number or if it is not a PR (e.g. a build on a
-normal branch), then the build proceeds without issues.
-"""
-
-import argparse
-import codecs
-import contextlib
-import json
-import os
-import sys
-
-try:
-    from urllib.request import (
-        Request,
-        urlopen,
-    )
-except ImportError:
-    from urllib2 import (
-        Request,
-        urlopen,
-    )
-
-
-def request_json(url, headers={}):
-    request = Request(url, headers=headers)
-    with contextlib.closing(urlopen(request)) as response:
-        reader = codecs.getreader("utf-8")
-        return json.load(reader(response))
-
-
-def circle_check_latest_pr_build(repo, pr, build_num):
-    # Not a PR so it is latest.
-    if pr is None:
-        return True
-
-    headers = {
-        "Accept": "application/json",
-    }
-    url = "https://circleci.com/api/v1.1/project/github/{repo}/tree/pull/{pr}"
-
-    builds = request_json(url.format(repo=repo, pr=pr), headers=headers)
-
-    # Parse the response to get a list of build numbers for this PR.
-    job_name = os.environ.get("CIRCLE_JOB")
-    same_param_builds = []
-    for b in builds:
-        b_params = b.get("build_parameters") or {}
-        if b_params.get("CIRCLE_JOB") == job_name:
-            same_param_builds.append(b)
-    pr_build_nums = set(map(lambda b: int(b["build_num"]), same_param_builds))
-    pr_build_nums.add(build_num)
-
-    # Check if our build number is the latest (largest)
-    # out of all of the builds for this PR.
-    if build_num < max(pr_build_nums):
-        return False
-    else:
-        return True
-
-
-def travis_check_latest_pr_build(repo, pr, build_num):
-    # Not a PR so it is latest.
-    if pr is None:
-        return True
-
-    headers = {
-        "Accept": "application/vnd.travis-ci.2+json",
-    }
-    url = "https://api.travis-ci.org/repos/{repo}/builds?event_type=pull_request"
-
-    data = request_json(url.format(repo=repo), headers=headers)
-
-    # Parse the response to get a list of build numbers for this PR.
-    builds = data["builds"]
-    pr_builds = filter(lambda b: b["pull_request_number"] == pr, builds)
-    pr_build_nums = set(map(lambda b: int(b["number"]), pr_builds))
-    pr_build_nums.add(build_num)
-
-    # Check if our build number is the latest (largest)
-    # out of all of the builds for this PR.
-    if build_num < max(pr_build_nums):
-        return False
-    else:
-        return True
-
-
-def appveyor_check_latest_pr_build(repo, pr, build_num, total_builds=50):
-    # Not a PR so it is latest.
-    if pr is None:
-        return True
-
-    headers = {
-        "Accept": "application/json",
-    }
-    url = "https://ci.appveyor.com/api/projects/{repo}/history?recordsNumber={total_builds}"
-
-    data = request_json(url.format(repo=repo, total_builds=total_builds), headers=headers)
-
-    # Parse the response to get a list of build numbers for this PR.
-    builds = data["builds"]
-    pr_builds = filter(lambda b: b.get("pullRequestId", "") == str(pr), builds)
-    pr_build_nums = set(map(lambda b: int(b["buildNumber"]), pr_builds))
-    pr_build_nums.add(build_num)
-
-    # Check if our build number is the latest (largest)
-    # out of all of the builds for this PR.
-    if build_num < max(pr_build_nums):
-        return False
-    else:
-        return True
-
-
-def main(*args):
-    if not args:
-        args = sys.argv[1:]
-
-    parser = argparse.ArgumentParser(
-        description=__doc__.strip().splitlines()[0]
-    )
-    parser.add_argument(
-        "-v",
-        "--verbose",
-        action="store_true",
-        help="Whether to include output",
-    )
-    parser.add_argument(
-        "--ci",
-        required=True,
-        choices=[
-            "circle",
-            "travis",
-            "appveyor",
-        ],
-        help="Which CI to check for an outdated build",
-    )
-    parser.add_argument(
-        "repo",
-        type=str,
-        help="GitHub repo name (e.g. `user/repo`.)",
-    )
-    parser.add_argument(
-        "bld",
-        type=int,
-        help="CI build number for this pull request",
-    )
-    parser.add_argument(
-        "pr",
-        nargs="?",
-        default="",
-        help="GitHub pull request number of this build",
-    )
-
-    params = parser.parse_args(args)
-    verbose = params.verbose
-    ci = params.ci
-    repo = params.repo
-    bld = params.bld
-    try:
-        pr = int(params.pr)
-    except ValueError:
-        pr = None
-
-    if verbose:
-        print("Checking to see if this PR build is outdated.")
-
-    exit_code = 0
-    if ci == "circle":
-        exit_code = int(circle_check_latest_pr_build(repo, pr, bld) is False)
-    elif ci == "travis":
-        exit_code = int(travis_check_latest_pr_build(repo, pr, bld) is False)
-    elif ci == "appveyor":
-        exit_code = int(appveyor_check_latest_pr_build(repo, pr, bld) is False)
-
-    if verbose and exit_code == 1:
-        print("Failing outdated PR build to end it.")
-
-    return exit_code
-
-
-if __name__ == "__main__":
-    sys.exit(main())
diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 31866987..3de40b01 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -4,6 +4,4 @@ Before you submit a pull request, check that it meets these guidelines:
 2. If the pull request adds functionality, the docs should be updated. Put
    your new functionality into a function with a docstring, and add the
    feature to the list in README.rst.
-3. The pull request should work for Python 3.6, 3.7, and 3.8. Check
-   https://travis-ci.org/dask/dask-image/pull_requests
-   and make sure that the tests pass for all supported Python versions.
+3. The pull request should work for Python 3.6, 3.7, and 3.8.
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 00000000..efb7f682
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,40 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: true
+      matrix:
+        os: ["windows-latest", "ubuntu-latest", "macos-latest"]
+        python-version: ["3.6", "3.7", "3.8"]
+
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v2
+
+      - name: Setup Conda Environment
+        uses: conda-incubator/setup-miniconda@v2
+        with:
+          miniconda-version: "latest"
+          python-version: ${{ matrix.python-version }}
+          environment-file: continuous_integration/environment-${{ matrix.python-version }}.yml
+          activate-environment: dask-image-testenv
+          auto-activate-base: false
+
+      - name: Install dask-image
+        shell: bash -l {0}
+        run: |
+          conda activate dask-image-testenv
+          python -m pip install -e .
+          conda list
+
+      - name: Run tests
+        shell: bash -l {0}
+        run: pytest -v
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 6ca8e97f..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,38 +0,0 @@
-sudo: false
-
-language: generic
-
-os: osx
-osx_image: xcode9.4
-
-env:
-  - PYVER="38"
-  - PYVER="37"
-  - PYVER="36"
-
-install:
-  # Install and Configure Miniconda.
-  - source .travis_support/install_miniconda.sh
-
-  # Create the test environment.
-  - export CONDA_ENV_TYPE="tst_py${PYVER}"
-  - source .travis_support/create_env.sh
-
-  # Install the package and dependencies.
-  - pip install -e .
-
-# Run tests and measure test coverage.
-script:
-  - coverage erase
-  - coverage run --source . setup.py test
-  - coverage report -m
-
-# Report coverage.
-after_success:
-  - export CONDA_ENV_TYPE="dpl"
-  - source .travis_support/create_env.sh
-  - coveralls
-
-# Disable email notifications.
-notifications:
-  email: false
diff --git a/.travis_support/create_env.sh b/.travis_support/create_env.sh
deleted file mode 100755
index 988a515c..00000000
--- a/.travis_support/create_env.sh
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/bash
-
-# Some reasonable bash constraints.
-set -xeuo pipefail
-
-# Check CONDA_ENV_TYPE was set.
-if [ -z "${CONDA_ENV_TYPE}" ]; then
-    echo "Set $CONDA_ENV_TYPE externally."
-    exit 1
-fi
-
-# Activate conda.
-conda activate
-
-# Create a temporary directory for the environment.
-export CONDA_ENV_PREFIX="$(python -c 'import tempfile; print(tempfile.mkdtemp())')"
-export CONDA_ENV_PATH="${CONDA_ENV_PREFIX}/${CONDA_ENV_TYPE}"
-export CONDA_ENV_SPEC=".travis_support/environments/${CONDA_ENV_TYPE}.yml"
-
-# Fill the temporary directory.
-conda env create -p "${CONDA_ENV_PATH}" -f "${CONDA_ENV_SPEC}"
-conda activate "${CONDA_ENV_PATH}"
-
-# The Python library pims requres matplotlib with the 'Agg' backend
-export MPLBACKEND='Agg'
-
-# Unset all bash constraints.
-set +xeuo pipefail
diff --git a/.travis_support/environments/dpl.yml b/.travis_support/environments/dpl.yml
deleted file mode 100644
index 8dd0e200..00000000
--- a/.travis_support/environments/dpl.yml
+++ /dev/null
@@ -1,12 +0,0 @@
-name: dask_image_dpl_env
-
-channels:
-  - defaults
-  - conda-forge
-
-dependencies:
-  - python=3.6.*
-  - pip==18.0
-  - wheel==0.31.1
-  - coverage==4.5.1
-  - coveralls==1.3.0
diff --git a/.travis_support/environments/tst_py36.yml b/.travis_support/environments/tst_py36.yml
deleted file mode 100644
index 81503b93..00000000
--- a/.travis_support/environments/tst_py36.yml
+++ /dev/null
@@ -1,22 +0,0 @@
-name: dask_image_py36_env
-
-channels:
-  - conda-forge
-
-dependencies:
-  - python=3.6.*
-  - pip==19.0.1
-  - wheel==0.32.3
-  - coverage==4.5.2
-  - flake8==3.7.2
-  - numpy==1.16.0
-  - scipy==1.2.0
-  - pims==0.4.1
-  - slicerator==0.9.8
-  - pip:
-    - slicerator==0.9.8
-    - pytest==5.2.0
-    - pytest-flake8==1.0.4
-    - dask==2.8.1
-    - scikit-image==0.14.2
-
diff --git a/.travis_support/environments/tst_py37.yml b/.travis_support/environments/tst_py37.yml
deleted file mode 100644
index 779ba76a..00000000
--- a/.travis_support/environments/tst_py37.yml
+++ /dev/null
@@ -1,21 +0,0 @@
-name: dask_image_py37_env
-
-channels:
-  - conda-forge
-
-dependencies:
-  - python=3.7.*
-  - pip==19.0.1
-  - wheel==0.32.3
-  - coverage==4.5.2
-  - flake8==3.7.2
-  - numpy==1.16.0
-  - scipy==1.2.0
-  - pims==0.4.1
-  - slicerator==0.9.8
-  - pip:
-    - slicerator==0.9.8
-    - pytest==5.2.0
-    - pytest-flake8==1.0.4
-    - dask==2.8.1
-    - scikit-image==0.14.2
diff --git a/.travis_support/install_miniconda.sh b/.travis_support/install_miniconda.sh
deleted file mode 100755
index ca9677fa..00000000
--- a/.travis_support/install_miniconda.sh
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/bin/bash
-
-# Some reasonable bash constraints.
-set -xeuo pipefail
-
-# Miniconda Config:
-export MINICONDA_VERSION="4.8.2"
-export MINICONDA_MD5="e0320c20ea13d04407424ecf57b70eaf"
-export MINICONDA_INSTALLER="${HOME}/miniconda.sh"
-export MINICONDA_DIR="${HOME}/miniconda"
-export MINICONDA_URL="https://repo.anaconda.com/miniconda/Miniconda3-py37_${MINICONDA_VERSION}-MacOSX-x86_64.sh"
-
-# Install Miniconda.
-curl -L "${MINICONDA_URL}" > "${MINICONDA_INSTALLER}"
-openssl md5 "${MINICONDA_INSTALLER}" | grep "${MINICONDA_MD5}"
-bash "${MINICONDA_INSTALLER}" -b -p "${MINICONDA_DIR}"
-rm -f "${MINICONDA_INSTALLER}"
-
-# Activate conda.
-source "${MINICONDA_DIR}/etc/profile.d/conda.sh"
-conda activate
-
-# Configure conda.
-conda config --set show_channel_urls true
-conda config --set auto_update_conda false
-conda config --set add_pip_as_python_dependency true
-
-# Unset all bash constraints.
-set +xeuo pipefail
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 1c530127..e5511b11 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -130,52 +130,32 @@ Running tests locally
 
 To setup a local testing environment that matches the test environments we use
 for our continuous integration services, you can use the ``.yml``
-conda environment files included in the dask-image repository.
-
-The test environment ``.yml`` files are included in hidden folders:
-
-- Linux test environment files are found in ``.circleci/environments``
-- MacOS test environment files are found in ``.travis_support/environments``
-- Windows test environment files are found in ``.appveyor_support\environments``
+conda environment files included in the ``continuous_integration`` folder
+in the dask-image repository.
 
 There is a separate environment file for each supported Python version.
 
-.. note::
-    If you do not have Anaconda/miniconda installed, please follow
-    `these instructions <https://docs.conda.io/projects/conda/en/latest/user-guide/install/>`_.
-
-
 We will use conda to
 `create an environment from a file
 <https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html#creating-an-environment-from-an-environment-yml-file>`_
 (``conda env create -f name-of-environment-file.yml``).
 
+.. note::
+    If you do not have Anaconda/miniconda installed, please follow
+    `these instructions <https://docs.conda.io/projects/conda/en/latest/user-guide/install/>`_.
 
-For example, to make a Python 3.8 test environment on Linux, MacOS, or Windows,
-we would use the command shown in the table below:
-
-.. list-table:: Creating a test environment for dask-image with Python 3.8
-    :widths: 20 50
-    :header-rows: 1
-
-    * - OS
-      - conda command
-    * - Linux
-      - ``conda env create -f .circleci/environments/tst_py38.yml``
-    * - MacOS
-      - ``conda env create -f .travis_support/environment/tst_py38.yml``
-    * - Windows
-      - ``conda env create -f .appveyor_support\environments\tst_py38.yml``
+.. code-block:: console
 
+    $ conda env create -f continuous_integration/environment-latest.yml
 
-This command will create a new conda test environment for Python 3.8,
-called ``dask_image_py38_env`` with all the dependencies.
+This command will create a new conda test environment
+called ``dask-image-testenv`` with all required dependencies.
 
 Now you can activate your new testing environment with::
 
 .. code-block:: console
 
-    $ conda activate dask_image_py38_env
+    $ conda activate dask-image-testenv
 
 Finally, install the development version of dask-image::
 
diff --git a/README.rst b/README.rst
index 412d1cb5..e20e906f 100644
--- a/README.rst
+++ b/README.rst
@@ -11,9 +11,9 @@ dask-image
         :target: https://anaconda.org/conda-forge/dask-image
         :alt: conda-forge
 
-.. image:: https://img.shields.io/travis/dask/dask-image/main.svg
-        :target: https://travis-ci.org/dask/dask-image
-        :alt: Travis CI
+.. image:: https://github.com/dask/dask-image/workflows/CI/badge.svg
+        :target: https://github.com/dask/dask-image/actions
+        :alt: GitHub Actions CI
 
 .. image:: https://readthedocs.org/projects/dask-image/badge/?version=latest
         :target: https://dask-image.readthedocs.io/en/latest/?badge=latest
diff --git a/.appveyor_support/environments/tst_py36.yml b/continuous_integration/environment-3.6.yml
similarity index 76%
rename from .appveyor_support/environments/tst_py36.yml
rename to continuous_integration/environment-3.6.yml
index 22b28ebb..9f173d68 100644
--- a/.appveyor_support/environments/tst_py36.yml
+++ b/continuous_integration/environment-3.6.yml
@@ -1,4 +1,4 @@
-name: dask_image_py36_env
+name: dask-image-testenv
 
 channels:
   - conda-forge
@@ -16,6 +16,4 @@ dependencies:
   - scipy==1.2.0
   - scikit-image==0.14.2
   - pims==0.4.1
-  - slicerator==0.9.8
-  - pip:
-    - slicerator==0.9.8
+  - slicerator
diff --git a/.appveyor_support/environments/tst_py37.yml b/continuous_integration/environment-3.7.yml
similarity index 76%
rename from .appveyor_support/environments/tst_py37.yml
rename to continuous_integration/environment-3.7.yml
index 88b6b810..b86e35bc 100644
--- a/.appveyor_support/environments/tst_py37.yml
+++ b/continuous_integration/environment-3.7.yml
@@ -1,4 +1,4 @@
-name: dask_image_py37_env
+name: dask-image-testenv
 
 channels:
   - conda-forge
@@ -16,6 +16,4 @@ dependencies:
   - scipy==1.2.0
   - scikit-image==0.14.2
   - pims==0.4.1
-  - slicerator==0.9.8
-  - pip:
-    - slicerator==0.9.8
+  - slicerator
diff --git a/.travis_support/environments/tst_py38.yml b/continuous_integration/environment-3.8-dev.yml
similarity index 81%
rename from .travis_support/environments/tst_py38.yml
rename to continuous_integration/environment-3.8-dev.yml
index 02be43bc..4f96c73b 100644
--- a/.travis_support/environments/tst_py38.yml
+++ b/continuous_integration/environment-3.8-dev.yml
@@ -1,4 +1,4 @@
-name: dask_image_py38_env
+name: dask-image-testenv
 
 channels:
   - conda-forge
@@ -16,4 +16,5 @@ dependencies:
   - scipy==1.3.2
   - scikit-image==0.16.2
   - pims==0.4.1
-  - slicerator==1.0.0
+  - slicerator
+  # dev dependencies
diff --git a/.circleci/environments/tst_py38.yml b/continuous_integration/environment-3.8.yml
similarity index 84%
rename from .circleci/environments/tst_py38.yml
rename to continuous_integration/environment-3.8.yml
index 02be43bc..386b4368 100644
--- a/.circleci/environments/tst_py38.yml
+++ b/continuous_integration/environment-3.8.yml
@@ -1,4 +1,4 @@
-name: dask_image_py38_env
+name: dask-image-testenv
 
 channels:
   - conda-forge
@@ -16,4 +16,4 @@ dependencies:
   - scipy==1.3.2
   - scikit-image==0.16.2
   - pims==0.4.1
-  - slicerator==1.0.0
+  - slicerator
diff --git a/.appveyor_support/environments/tst_py38.yml b/continuous_integration/environment-latest.yml
similarity index 84%
rename from .appveyor_support/environments/tst_py38.yml
rename to continuous_integration/environment-latest.yml
index 02be43bc..386b4368 100644
--- a/.appveyor_support/environments/tst_py38.yml
+++ b/continuous_integration/environment-latest.yml
@@ -1,4 +1,4 @@
-name: dask_image_py38_env
+name: dask-image-testenv
 
 channels:
   - conda-forge
@@ -16,4 +16,4 @@ dependencies:
   - scipy==1.3.2
   - scikit-image==0.16.2
   - pims==0.4.1
-  - slicerator==1.0.0
+  - slicerator