diff --git a/clr_test/clearing-all/Dockerfile b/clr_test/clearing-all/Dockerfile
index cb2476d7b..a1021aae8 100644
--- a/clr_test/clearing-all/Dockerfile
+++ b/clr_test/clearing-all/Dockerfile
@@ -1,4 +1,4 @@
-FROM mirror.gcr.io/openjdk:17-alpine
+FROM mirror.gcr.io/openjdk:17-slim
 
 ENV CLEARING_HOME="/opt/clearing"
 ENV CLEARING_HOME_BIN="/opt/clearing/bin"
@@ -37,7 +37,7 @@ RUN sed -i 's/\r$//' $CLEARING_HOME/clearing_testing_utils/clearing-checker/*.sh
 RUN sed -i 's/\r$//' $CLEARING_HOME/clearing_testing_utils/clearing-converter/*.sh
 RUN sed -i 's/\r$//' $CLEARING_HOME/clearing_testing_utils/clearing-tester/*.sh
 
-RUN apk update && apk add git make libc-dev gcc
+RUN apt update && apt install -y git make libc-dev gcc
 RUN git clone https://github.com/wolfcw/libfaketime.git
 RUN make install -C libfaketime/src/