diff --git a/.travis.yml b/.travis.yml
index ec31bcd..321fcf4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,14 +16,20 @@ install:
 
 before_script:
   - env | sort
+  - wget -qO- 'https://github.com/tianon/pgp-happy-eyeballs/raw/master/hack-my-builds.sh' | bash
   - cd "$VERSION/$VARIANT"
   - image="$(awk 'toupper($1) == "FROM" { print $2; exit }' management/Dockerfile)"
 
 script:
-  - travis_retry docker build -t "$image" .
-  - ~/official-images/test/run.sh "$image"
-  - travis_retry docker build -t "${image}-management" management
-  - ~/official-images/test/run.sh "${image}-management"
+  - |
+    (
+      set -Eeuo pipefail
+      set -x
+      docker build -t "$image" .
+      ~/official-images/test/run.sh "$image"
+      docker build -t "${image}-management" management
+      ~/official-images/test/run.sh "${image}-management"
+    )
 
 after_script:
   - docker images
diff --git a/3.6-rc/alpine/Dockerfile b/3.6-rc/alpine/Dockerfile
index 0a7f41e..b17c255 100644
--- a/3.6-rc/alpine/Dockerfile
+++ b/3.6-rc/alpine/Dockerfile
@@ -55,6 +55,7 @@ RUN set -ex; \
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$RABBITMQ_GPG_KEY"; \
 	gpg --batch --verify rabbitmq-server.tar.xz.asc rabbitmq-server.tar.xz; \
+	command -v gpgconf && gpgconf --kill all || :; \
 	rm -rf "$GNUPGHOME"; \
 	\
 	mkdir -p "$RABBITMQ_HOME"; \
diff --git a/3.6-rc/debian/Dockerfile b/3.6-rc/debian/Dockerfile
index 292fdc1..a6ade63 100644
--- a/3.6-rc/debian/Dockerfile
+++ b/3.6-rc/debian/Dockerfile
@@ -31,6 +31,7 @@ RUN set -eux; \
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4; \
 	gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu; \
+	command -v gpgconf && gpgconf --kill all || :; \
 	rm -rf "$GNUPGHOME" /usr/local/bin/gosu.asc; \
 	\
 	chmod +x /usr/local/bin/gosu; \
@@ -91,6 +92,7 @@ RUN set -eux; \
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$RABBITMQ_GPG_KEY"; \
 	gpg --batch --verify rabbitmq-server.deb.asc rabbitmq-server.deb; \
+	command -v gpgconf && gpgconf --kill all || :; \
 	rm -rf "$GNUPGHOME"; \
 	\
 	apt install -y --no-install-recommends ./rabbitmq-server.deb; \
diff --git a/3.6/alpine/Dockerfile b/3.6/alpine/Dockerfile
index b5ecb43..449f36a 100644
--- a/3.6/alpine/Dockerfile
+++ b/3.6/alpine/Dockerfile
@@ -55,6 +55,7 @@ RUN set -ex; \
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$RABBITMQ_GPG_KEY"; \
 	gpg --batch --verify rabbitmq-server.tar.xz.asc rabbitmq-server.tar.xz; \
+	command -v gpgconf && gpgconf --kill all || :; \
 	rm -rf "$GNUPGHOME"; \
 	\
 	mkdir -p "$RABBITMQ_HOME"; \
diff --git a/3.6/debian/Dockerfile b/3.6/debian/Dockerfile
index 1715408..11e6772 100644
--- a/3.6/debian/Dockerfile
+++ b/3.6/debian/Dockerfile
@@ -31,6 +31,7 @@ RUN set -eux; \
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4; \
 	gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu; \
+	command -v gpgconf && gpgconf --kill all || :; \
 	rm -rf "$GNUPGHOME" /usr/local/bin/gosu.asc; \
 	\
 	chmod +x /usr/local/bin/gosu; \
@@ -91,6 +92,7 @@ RUN set -eux; \
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$RABBITMQ_GPG_KEY"; \
 	gpg --batch --verify rabbitmq-server.deb.asc rabbitmq-server.deb; \
+	command -v gpgconf && gpgconf --kill all || :; \
 	rm -rf "$GNUPGHOME"; \
 	\
 	apt install -y --no-install-recommends ./rabbitmq-server.deb; \
diff --git a/3.7-rc/alpine/Dockerfile b/3.7-rc/alpine/Dockerfile
index d73c777..087538c 100644
--- a/3.7-rc/alpine/Dockerfile
+++ b/3.7-rc/alpine/Dockerfile
@@ -55,6 +55,7 @@ RUN set -ex; \
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$RABBITMQ_GPG_KEY"; \
 	gpg --batch --verify rabbitmq-server.tar.xz.asc rabbitmq-server.tar.xz; \
+	command -v gpgconf && gpgconf --kill all || :; \
 	rm -rf "$GNUPGHOME"; \
 	\
 	mkdir -p "$RABBITMQ_HOME"; \
diff --git a/3.7-rc/debian/Dockerfile b/3.7-rc/debian/Dockerfile
index a361764..66d7506 100644
--- a/3.7-rc/debian/Dockerfile
+++ b/3.7-rc/debian/Dockerfile
@@ -112,6 +112,7 @@ RUN set -eux; \
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$RABBITMQ_GPG_KEY"; \
 	gpg --batch --verify rabbitmq-server.deb.asc rabbitmq-server.deb; \
+	command -v gpgconf && gpgconf --kill all || :; \
 	rm -rf "$GNUPGHOME"; \
 	\
 	apt install -y --no-install-recommends ./rabbitmq-server.deb; \
diff --git a/3.7/alpine/Dockerfile b/3.7/alpine/Dockerfile
index 3270b73..8a08f0e 100644
--- a/3.7/alpine/Dockerfile
+++ b/3.7/alpine/Dockerfile
@@ -55,6 +55,7 @@ RUN set -ex; \
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$RABBITMQ_GPG_KEY"; \
 	gpg --batch --verify rabbitmq-server.tar.xz.asc rabbitmq-server.tar.xz; \
+	command -v gpgconf && gpgconf --kill all || :; \
 	rm -rf "$GNUPGHOME"; \
 	\
 	mkdir -p "$RABBITMQ_HOME"; \
diff --git a/3.7/debian/Dockerfile b/3.7/debian/Dockerfile
index cef3672..188d22d 100644
--- a/3.7/debian/Dockerfile
+++ b/3.7/debian/Dockerfile
@@ -31,6 +31,7 @@ RUN set -eux; \
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4; \
 	gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu; \
+	command -v gpgconf && gpgconf --kill all || :; \
 	rm -rf "$GNUPGHOME" /usr/local/bin/gosu.asc; \
 	\
 	chmod +x /usr/local/bin/gosu; \
@@ -112,6 +113,7 @@ RUN set -eux; \
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$RABBITMQ_GPG_KEY"; \
 	gpg --batch --verify rabbitmq-server.deb.asc rabbitmq-server.deb; \
+	command -v gpgconf && gpgconf --kill all || :; \
 	rm -rf "$GNUPGHOME"; \
 	\
 	apt install -y --no-install-recommends ./rabbitmq-server.deb; \