diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 393d4c4..d5ae20b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,9 +13,10 @@ jobs:
     test:
         name: CI
         strategy:
+            fail-fast: false
             matrix:
                 os: [ubuntu-latest, windows-latest, macOS-latest]
-                dc: [dmd-latest, ldc-latest]
+                dc: [dmd-latest, ldc-latest, dmd-2.079.0, ldc-1.9.0, ldc-1.17.0]
                 arch: [x86_64]
                 config: [select, epoll, cfrunloop, winapi]
                 exclude:
@@ -25,6 +26,14 @@ jobs:
                   - {os: macOS-latest, config: winapi}
                   - {os: windows-latest, config: cfrunloop}
                   - {os: windows-latest, config: epoll}
+                  # macOS fails up to FE 2.086.x, so we test on a slightly newer
+                  # version instead
+                  # "dyld: lazy symbol binding failed: Symbol not found: _dyld_enumerate_tlv_storage"
+                  - {os: macOS-latest, dc: dmd-2.079.0}
+                  - {os: macOS-latest, dc: ldc-1.9.0}
+                  - {os: windows-latest, dc: ldc-1.9.0, config: select}
+                  - {os: windows-latest, dc: ldc-1.17.0}
+                  - {os: ubuntu-latest, dc: ldc-1.17.0}
 
         runs-on: ${{ matrix.os }}
         steps:
@@ -38,5 +47,6 @@ jobs:
             - name: Run tests
               env:
                 CONFIG: ${{matrix.config}}
+                ARCH: ${{matrix.arch}}
               shell: bash
-              run: ./travis-ci.sh
+              run: ./run-ci.sh
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 7c6062d..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,50 +0,0 @@
-language: d
-
-os:
-    - linux
-    - osx
-
-d:
-  # order: latest DMD, oldest DMD, LDC/GDC, remaining DMD versions
-  # this way the overall test time gets cut down (GDC/LDC are a lot
-  # slower tham DMD, so they should be started early), while still
-  # catching most DMD version related build failures early
-  # latest 4 versions plus the oldest supported version should be present
-  - dmd-2.087.1
-  - dmd-2.078.3
-  - ldc-1.17.0
-  - ldc-1.16.0
-  - ldc-1.15.0
-  - ldc-1.14.0
-  - ldc-1.9.0
-  - dmd-2.086.1
-  - dmd-2.085.1
-  - dmd-2.084.1
-  - dmd-2.079.0
-  - dmd-beta
-
-env:
-    - CONFIG=select
-    - CONFIG=epoll
-    - CONFIG=cfrunloop
-    - CONFIG=libasync
-
-matrix:
-  allow_failures:
-    - d: dmd-beta
-  include:
-    - os: osx
-      d: ldc
-      env: CONFIG=kqueue
-  exclude:
-    - env: CONFIG=libasync
-    - os: osx
-      env: CONFIG=epoll
-    - os: linux
-      env: CONFIG=cfrunloop
-    - os: osx
-      d: dmd-beta
-
-script: ./travis-ci.sh
-
-sudo: false
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 8f73b8f..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,156 +0,0 @@
-platform: x64
-environment:
- matrix:
-  - DC: dmd
-    DVersion: 2.087.1
-    arch: x64
-    config: winapi
-  - DC: dmd
-    DVersion: 2.087.1
-    arch: x86
-    config: winapi-optlink
-  - DC: dmd
-    DVersion: 2.087.1
-    arch: x86_mscoff
-    config: winapi
-  - DC: dmd
-    DVersion: 2.086.1
-    arch: x64
-    config: winapi
-  - DC: dmd
-    DVersion: 2.085.1
-    arch: x86_mscoff
-    config: winapi
-  - DC: dmd
-    DVersion: 2.084.1
-    arch: x86
-    config: winapi-optlink
-  - DC: dmd
-    DVersion: 2.083.1
-    arch: x64
-    config: winapi
-  - DC: dmd
-    DVersion: 2.079.0
-    arch: x64
-    config: winapi
-  - DC: ldc
-    DVersion: 1.17.0
-    arch: x64
-    config: winapi
-  - DC: ldc
-    DVersion: 1.16.0
-    arch: x64
-    config: winapi
-  - DC: ldc
-    DVersion: 1.15.0
-    arch: x64
-    config: winapi
-  - DC: ldc
-    DVersion: 1.14.0
-    arch: x86
-    config: winapi
-  - DC: ldc
-    DVersion: 1.9.0
-    arch: x64
-    config: winapi
-
-matrix:
-  allow_failures:
-    - CONFIG: libasync
-
-skip_tags: false
-branches:
-  only:
-    - master
-
-install:
-  - ps: function SetUpDCompiler
-        {
-            if($env:DC -eq "dmd"){
-              if($env:arch -eq "x86"){
-                $env:DConf = "m32";
-              }
-              elseif($env:arch -eq "x64"){
-                $env:DConf = "m64";
-              }
-              echo "downloading ...";
-              $env:toolchain = "msvc";
-              $version = $env:DVersion;
-              Invoke-WebRequest "http://downloads.dlang.org/releases/2.x/$($version)/dmd.$($version).windows.7z" -OutFile "c:\dmd.7z";
-              echo "finished.";
-              pushd c:\\;
-              7z x dmd.7z > $null;
-              popd;
-            }
-            elseif($env:DC -eq "ldc"){
-              echo "downloading ...";
-              if($env:arch -eq "x86"){
-                $env:DConf = "m32";
-              }
-              elseif($env:arch -eq "x64"){
-                $env:DConf = "m64";
-              }
-              $env:toolchain = "msvc";
-              $version = $env:DVersion;
-              if ([System.Version]$version -lt [System.Version]"1.7.0") {
-                Invoke-WebRequest "https://github.com/ldc-developers/ldc/releases/download/v$($version)/ldc2-$($version)-win64-msvc.zip" -OutFile "c:\ldc.zip";
-                echo "finished.";
-                pushd c:\\;
-                7z x ldc.zip > $null;
-                popd;
-              }
-              else {
-                Invoke-WebRequest "https://github.com/ldc-developers/ldc/releases/download/v$($version)/ldc2-$($version)-windows-multilib.7z" -OutFile "c:\ldc.7z";
-                echo "finished.";
-                pushd c:\\;
-                7z x ldc.7z > $null;
-                popd;
-              }
-            }
-        }
-  - ps: SetUpDCompiler
-  - powershell -Command [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; Invoke-WebRequest "https://github.com/dlang/dub/releases/download/v1.7.2/dub-1.7.2-windows-x86.zip" -OutFile dub.zip
-  - 7z x dub.zip -odub > nul
-  - set PATH=%CD%\%binpath%;%CD%\dub;%PATH%
-  - dub --version
-
-before_build:
-  - ps: if($env:arch -eq "x86"){
-            $env:compilersetupargs = "x86";
-            $env:Darch = "x86";
-          }
-        elseif($env:arch -eq "x86_mscoff"){
-            $env:compilersetupargs = "x86";
-            $env:Darch = "x86_mscoff";
-        }
-        elseif($env:arch -eq "x64"){
-            $env:compilersetupargs = "amd64";
-            $env:Darch = "x86_64";
-        }
-  - ps : if($env:DC -eq "dmd"){
-           $env:PATH += ";C:\dmd2\windows\bin;";
-         }
-         elseif($env:DC -eq "ldc"){
-           $version = $env:DVersion;
-           if ([System.Version]$version -lt [System.Version]"1.7.0") {
-             $env:PATH += ";C:\ldc2-$($version)-win64-msvc\bin";
-           } else {
-             $env:PATH += ";C:\ldc2-$($version)-windows-multilib\bin";
-           }
-           $env:DC = "ldc2";
-         }
-  - ps: $env:compilersetup = "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall";
-  - '"%compilersetup%" %compilersetupargs%'
-
-build_script:
- - dub build -b release --arch=%Darch% --compiler=%DC% --config=%CONFIG%
- - echo dummy build script - dont remove me
-
-test_script:
- - echo %PLATFORM%
- - echo %Darch%
- - echo %DC%
- - echo %PATH%
- - '%DC% --version'
- - dub test --arch=%Darch% --compiler=%DC% --config=%CONFIG%
- - for %%i in (tests\*.d) do echo %%i && dub --single %%i --arch=%Darch% --compiler=%DC% --override-config eventcore/%CONFIG% || exit /B 1
diff --git a/travis-ci.sh b/run-ci.sh
similarity index 51%
rename from travis-ci.sh
rename to run-ci.sh
index 83bbb4a..f2b1f44 100755
--- a/travis-ci.sh
+++ b/run-ci.sh
@@ -3,19 +3,19 @@
 set -e -x -o pipefail
 
 # test for successful release build
-dub build -b release --compiler=$DC -c $CONFIG
+dub build -b release --arch=$ARCH --compiler=$DC -c $CONFIG
 
 # test for successful 32-bit build
 if [ "$DC" == "ldc2" ]; then
 	dub build --arch=x86 --compiler=ldc2 -c $CONFIG
 fi
 
-dub test --compiler=$DC -c $CONFIG
+dub test --arch=$ARCH --compiler=$DC -c $CONFIG
 
 if [ ${BUILD_EXAMPLE=1} -eq 1 ]; then
     for ex in $(\ls -1 examples/*.d); do
         echo "[INFO] Building example $ex"
-        dub build --compiler=$DC --override-config eventcore/$CONFIG --single $ex
+        dub build --arch=$ARCH --compiler=$DC --override-config eventcore/$CONFIG --single $ex
     done
     rm -rf examples/.dub/
     rm -f examples/*-example
@@ -24,6 +24,8 @@ fi
 if [ ${RUN_TEST=1} -eq 1 ]; then
     for ex in `\ls -1 tests/*.d`; do
         echo "[INFO] Running test $ex"
-        dub --temp-build --compiler=$DC --override-config eventcore/$CONFIG --single $ex
+        # NOTE: timer and directory watcher tests tend to be flaky on macOS VMs
+        dub --temp-build --arch=$ARCH --compiler=$DC --override-config eventcore/$CONFIG --single $ex \
+            || dub --temp-build --arch=$ARCH --compiler=$DC --override-config eventcore/$CONFIG --single $ex
     done
 fi