diff --git a/.appveyor.yml b/.appveyor.yml
index a6df47e..a25a72b 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -15,10 +15,7 @@ environment:
   DAILY_COMMIT: master
 
   matrix:
-    - PYTHON: C:\Python36
     - PYTHON: C:\Python36-x64
-    - PYTHON: C:\Python37
-    - PYTHON: C:\Python37-x64
 
 init:
   - "ECHO \"%APPVEYOR_SCHEDULED_BUILD%\""
@@ -54,7 +51,8 @@ install:
   # Install the build dependencies of the project.
   - pip install %NP_TEST_DEP%
   - pip install -r requirements\build.txt
-  - python setup.py bdist_wheel
+  - pip list
+  - python setup.py bdist_wheel -vv
   - ps: |
       # Upload artifact to Appveyor immediately after build
       ls dist -r | Foreach-Object {
@@ -80,6 +78,7 @@ test_script:
   # Check Python version just in case
   - python --version
   # Run unit tests with pytest
+  - pip list
   - pytest --pyargs skimage
   - cd ..
 
diff --git a/.travis.yml b/.travis.yml
index 7f9b934..fc605b3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -40,21 +40,10 @@ matrix:
       env:
         - MB_PYTHON_VERSION=3.6
         - PLAT=i686
-    - os: linux
-      env:
-        - MB_PYTHON_VERSION=3.7
-    - os: linux
-      env:
-        - MB_PYTHON_VERSION=3.7
-        - PLAT=i686
     - os: osx
       language: generic
       env:
         - MB_PYTHON_VERSION=3.6
-    - os: osx
-      language: generic
-      env:
-        - MB_PYTHON_VERSION=3.7
 
 before_install:
     - if [ "$TRAVIS_BRANCH" == "master" ]; then
diff --git a/config.sh b/config.sh
index c6dab02..c9ecc77 100644
--- a/config.sh
+++ b/config.sh
@@ -15,12 +15,13 @@ function pre_build {
 
 function pip_opts {
     # Define extra pip arguments
-    echo "--prefer-binary --find-links $EXTRA_WHEELS_URL" 
+    echo "--prefer-binary --find-links $EXTRA_WHEELS_URL"
 }
 
 function build_wheel {
     # Horrible set of build requirements installs too-recent numpy when using
     # default pip wheel command
+    pip list
     build_bdist_wheel $@
 }
 
@@ -28,5 +29,6 @@ function run_tests {
     # Runs tests on installed distribution from an empty directory
     python --version
     echo "backend : agg" > matplotlibrc
+    pip list
     pytest --pyargs skimage
 }