diff --git a/Makefile.am b/Makefile.am
index f06d0e3734..e4be3f26f9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -106,6 +106,7 @@ test-network: need-chutney-path $(TESTING_TOR_BINARY) src/tools/tor-gencert
 # Try both the BSD and the Linux ping6 syntax, because they're incompatible
 test-network-all: need-chutney-path test-driver $(TESTING_TOR_BINARY) src/tools/tor-gencert
 	mkdir -p $(TEST_NETWORK_ALL_LOG_DIR)
+	rm -f $(TEST_NETWORK_ALL_LOG_DIR)/*.log $(TEST_NETWORK_ALL_LOG_DIR)/*.trs
 	@flavors="$(TEST_CHUTNEY_FLAVORS)"; \
 	if ping6 -q -c 1 -o ::1 >/dev/null 2>&1 || ping6 -q -c 1 -W 1 ::1 >/dev/null 2>&1; then \
 		echo "ping6 ::1 succeeded, running IPv6 flavors: $(TEST_CHUTNEY_FLAVORS_IPV6)."; \
@@ -128,7 +129,7 @@ test-network-all: need-chutney-path test-driver $(TESTING_TOR_BINARY) src/tools/
 		$(SHELL) $(top_srcdir)/test-driver --test-name $$f --log-file $(TEST_NETWORK_ALL_LOG_DIR)/$$f.log --trs-file $(TEST_NETWORK_ALL_LOG_DIR)/$$f.trs $(TEST_NETWORK_ALL_DRIVER_FLAGS) $(top_srcdir)/src/test/test-network.sh --flavor $$f $(TEST_NETWORK_FLAGS); \
 	done; \
 	echo "Log and result files are available in $(TEST_NETWORK_ALL_LOG_DIR)."; \
-	! grep -q FAIL test_network_log/*.trs
+	! grep -q FAIL $(TEST_NETWORK_ALL_LOG_DIR)/*.trs
 
 need-stem-path:
 	@if test ! -d "$$STEM_SOURCE_DIR"; then \
diff --git a/changes/bug27295 b/changes/bug27295
new file mode 100644
index 0000000000..c5a364877a
--- /dev/null
+++ b/changes/bug27295
@@ -0,0 +1,3 @@
+  o Minor bugfixes (testing, chutney):
+    - Before running make test-network-all, delete old logs and test result
+      files, to avoid spurious failures. Fixes bug 27295; bugfix on 0.2.7.3-rc.