diff --git a/tests/spread/plugins/plainbox/snaps/checkbox/snap/snapcraft.yaml b/tests/spread/plugins/plainbox/snaps/checkbox/snap/snapcraft.yaml
index dcd564293b..82ec048c3f 100644
--- a/tests/spread/plugins/plainbox/snaps/checkbox/snap/snapcraft.yaml
+++ b/tests/spread/plugins/plainbox/snaps/checkbox/snap/snapcraft.yaml
@@ -19,6 +19,7 @@ parts:
         plugin: python
         python-packages:
             - checkbox-ng==1.0.0
+            - idna==2.7
             - requests-oauthlib
             - xlsxwriter
         build-packages:
diff --git a/tests/spread/plugins/plainbox/snaps/provider-basic/snap/snapcraft.yaml b/tests/spread/plugins/plainbox/snaps/provider-basic/snap/snapcraft.yaml
index 9bcaf3b498..d1c3483727 100644
--- a/tests/spread/plugins/plainbox/snaps/provider-basic/snap/snapcraft.yaml
+++ b/tests/spread/plugins/plainbox/snaps/provider-basic/snap/snapcraft.yaml
@@ -18,6 +18,7 @@ parts:
             - zlib1g-dev
             - build-essential
         python-packages:
+            - idna==2.7
             - requests-oauthlib
             - XlsxWriter
             - Jinja2
@@ -27,6 +28,8 @@ parts:
         plugin: python
         source: git://git.launchpad.net/checkbox-support
         source-type: git
+        python-packages:
+            - idna==2.7
     simple-plainbox-provider:
         plugin: plainbox-provider
         source: ./2016.com.example_simple
diff --git a/tests/spread/plugins/plainbox/snaps/provider-python-stage-package-mix/snap/snapcraft.yaml b/tests/spread/plugins/plainbox/snaps/provider-python-stage-package-mix/snap/snapcraft.yaml
index 3310e440b7..f0635b6468 100644
--- a/tests/spread/plugins/plainbox/snaps/provider-python-stage-package-mix/snap/snapcraft.yaml
+++ b/tests/spread/plugins/plainbox/snaps/provider-python-stage-package-mix/snap/snapcraft.yaml
@@ -12,6 +12,7 @@ parts:
   checkbox-ng-local:
     plugin: python
     python-packages:
+      - idna==2.7
       - checkbox-ng
       - requests-oauthlib
     stage-packages:
diff --git a/tests/spread/plugins/plainbox/snaps/provider-with-deps/snap/snapcraft.yaml b/tests/spread/plugins/plainbox/snaps/provider-with-deps/snap/snapcraft.yaml
index 0d582a8d7d..13d8cb7c0c 100644
--- a/tests/spread/plugins/plainbox/snaps/provider-with-deps/snap/snapcraft.yaml
+++ b/tests/spread/plugins/plainbox/snaps/provider-with-deps/snap/snapcraft.yaml
@@ -18,6 +18,7 @@ parts:
             - zlib1g-dev
             - build-essential
         python-packages:
+            - idna==2.7
             - requests-oauthlib
             - XlsxWriter
             - Jinja2
diff --git a/tests/spread/plugins/plainbox/snaps/provider-with-stage-packages/snap/snapcraft.yaml b/tests/spread/plugins/plainbox/snaps/provider-with-stage-packages/snap/snapcraft.yaml
index ad60f415ae..e8fcde4456 100644
--- a/tests/spread/plugins/plainbox/snaps/provider-with-stage-packages/snap/snapcraft.yaml
+++ b/tests/spread/plugins/plainbox/snaps/provider-with-stage-packages/snap/snapcraft.yaml
@@ -12,6 +12,7 @@ parts:
     checkbox-ng-local:
         plugin: python
         python-packages:
+            - idna==2.7
             - checkbox-ng
             - requests-oauthlib
         build-packages: