use args overrides to minimize diff

integration/dockerfiles/Dockerfile_test_cache

@@ -18,3 +18,5 @@
 
 FROM debian:10.13
 RUN date > /date
+COPY context/foo /foo
+# RUN echo hey

integration/dockerfiles/Dockerfile_test_cache_install

@@ -20,4 +20,5 @@ FROM debian:10.13
 RUN mkdir /foo
 WORKDIR /foo
 RUN apt-get update && apt-get install -y make
+COPY context/bar /context
 RUN echo "hey" > foo

integration/dockerfiles/Dockerfile_test_cache_install_oci

@@ -20,4 +20,5 @@ FROM debian:10.13
 RUN mkdir /foo
 WORKDIR /foo
 RUN apt-get update && apt-get install -y make
+COPY context/bar /context
 RUN echo "hey" > foo

integration/dockerfiles/Dockerfile_test_cache_oci

@@ -18,3 +18,5 @@
 
 FROM debian:10.13
 RUN date > /date
+COPY context/foo /foo
+# RUN echo hey

integration/images.go

@@ -87,6 +87,10 @@ var additionalKanikoFlagsMap = map[string][]string{
 	"Dockerfile_test_maintainer":             {"--single-snapshot"},
 	"Dockerfile_test_target":                 {"--target=second"},
 	"Dockerfile_test_snapshotter_ignorelist": {"--use-new-run=true", "-v=trace"},
+	"Dockerfile_test_cache":                  {"--cache-copy-layers=true"},
+	"Dockerfile_test_cache_oci":              {"--cache-copy-layers=true"},
+	"Dockerfile_test_cache_install":          {"--cache-copy-layers=true"},
+	"Dockerfile_test_cache_install_oci":      {"--cache-copy-layers=true"},
 	"Dockerfile_test_cache_copy":             {"--cache-copy-layers=true"},
 	"Dockerfile_test_cache_copy_oci":         {"--cache-copy-layers=true"},
 }