diff --git a/pct.sh b/pct.sh
index 2f9b12d92..cc00c81d7 100755
--- a/pct.sh
+++ b/pct.sh
@@ -80,6 +80,24 @@ if [[ $PLUGINS =~ jsch ]] || [[ $PLUGINS =~ okhttp-api ]]; then
 	MAVEN_PROPERTIES+=:jenkins-test-harness.version=1812.v6d4e97d91fd8
 fi
 
+#
+# The Subversion and Git plugins both define a descriptor with the "phabricator" symbol, causing
+# duplicate symbol errors with JCasC. As a temporary workaround, we exclude the Subversion plugin
+# from the dependency tree when running the Git plugin's test suite.
+#
+# TODO When jenkinsci/subversion-plugin#273 is merged and released, and when this repository has
+# adopted that release, this can be deleted.
+#
+if [[ $PLUGINS == git ]]; then
+	mkdir pct-work
+	pushd pct-work
+	jar xf ../megawar.war
+	rm -fv WEB-INF/plugins/subversion.hpi
+	jar c0Mf ../megawar.war *
+	popd
+	rm -rf pct-work
+fi
+
 #
 # Testing plugins against a version of Jenkins that requires Java 11 exposes
 # jenkinsci/plugin-pom#563. This was fixed in plugin parent POM 4.42, but many plugins under test