diff --git a/cpworker/tests/integration/idle_capture_test.go b/cpworker/tests/integration/idle_capture_test.go
index fe9d92a7..c131264f 100644
--- a/cpworker/tests/integration/idle_capture_test.go
+++ b/cpworker/tests/integration/idle_capture_test.go
@@ -62,6 +62,9 @@ func writeIdleCaptureConfig(t *testing.T, outputDir string, pipeline bool, timeo
 					"snaplen":    2048,
 					"bpf":        fmt.Sprintf("udp and port %d", s.port),
 					"timeout_ms": timeoutMs,
+					// The default 256 MB ring can take seconds to allocate on a host
+					// short of free memory, longer than the tests wait for startup.
+					"buffer_size_mb": 8,
 					// Test traffic and a zmq output both use 127.0.0.1; the default
 					// output-host exclusion would filter all of it out of the capture.
 					"not_filter_output_hosts": true,
diff --git a/cpworker/tests/integration/testdata/reload/pipeline_dest_a.json b/cpworker/tests/integration/testdata/reload/pipeline_dest_a.json
index c83f9f66..1936778b 100644
--- a/cpworker/tests/integration/testdata/reload/pipeline_dest_a.json
+++ b/cpworker/tests/integration/testdata/reload/pipeline_dest_a.json
@@ -4,7 +4,7 @@
   "tasks": [
     {
       "fingerprint": "dst-a",
-      "capturer": { "type": "libpcap", "libpcap": { "interface": "lo", "snaplen": 2048, "bpf": "udp and port 54321", "timeout_ms": 10 } },
+      "capturer": { "type": "libpcap", "libpcap": { "interface": "lo", "snaplen": 2048, "bpf": "udp and port 54321", "timeout_ms": 10, "buffer_size_mb": 8 } },
       "outputs": [ { "type": "file", "file": { "name": "testdata/output/reload/switch_pipeline/a.pcap" } } ]
     }
   ]
diff --git a/cpworker/tests/integration/testdata/reload/pipeline_dest_b.json b/cpworker/tests/integration/testdata/reload/pipeline_dest_b.json
index 33b5ee05..5d982f26 100644
--- a/cpworker/tests/integration/testdata/reload/pipeline_dest_b.json
+++ b/cpworker/tests/integration/testdata/reload/pipeline_dest_b.json
@@ -4,7 +4,7 @@
   "tasks": [
     {
       "fingerprint": "dst-b",
-      "capturer": { "type": "libpcap", "libpcap": { "interface": "lo", "snaplen": 2048, "bpf": "udp and port 54321", "timeout_ms": 10 } },
+      "capturer": { "type": "libpcap", "libpcap": { "interface": "lo", "snaplen": 2048, "bpf": "udp and port 54321", "timeout_ms": 10, "buffer_size_mb": 8 } },
       "outputs": [ { "type": "file", "file": { "name": "testdata/output/reload/switch_pipeline/b.pcap" } } ]
     }
   ]
diff --git a/cpworker/tests/integration/testdata/reload/rtc_dest_a.json b/cpworker/tests/integration/testdata/reload/rtc_dest_a.json
index 1abca73e..377c94e3 100644
--- a/cpworker/tests/integration/testdata/reload/rtc_dest_a.json
+++ b/cpworker/tests/integration/testdata/reload/rtc_dest_a.json
@@ -2,7 +2,7 @@
   "tasks": [
     {
       "fingerprint": "dst-a",
-      "capturer": { "type": "libpcap", "libpcap": { "interface": "lo", "snaplen": 2048, "bpf": "udp and port 54321", "timeout_ms": 10 } },
+      "capturer": { "type": "libpcap", "libpcap": { "interface": "lo", "snaplen": 2048, "bpf": "udp and port 54321", "timeout_ms": 10, "buffer_size_mb": 8 } },
       "outputs": [ { "type": "file", "file": { "name": "testdata/output/reload/switch_rtc/a.pcap" } } ]
     }
   ]
diff --git a/cpworker/tests/integration/testdata/reload/rtc_dest_b.json b/cpworker/tests/integration/testdata/reload/rtc_dest_b.json
index ccc066ba..c7c17301 100644
--- a/cpworker/tests/integration/testdata/reload/rtc_dest_b.json
+++ b/cpworker/tests/integration/testdata/reload/rtc_dest_b.json
@@ -2,7 +2,7 @@
   "tasks": [
     {
       "fingerprint": "dst-b",
-      "capturer": { "type": "libpcap", "libpcap": { "interface": "lo", "snaplen": 2048, "bpf": "udp and port 54321", "timeout_ms": 10 } },
+      "capturer": { "type": "libpcap", "libpcap": { "interface": "lo", "snaplen": 2048, "bpf": "udp and port 54321", "timeout_ms": 10, "buffer_size_mb": 8 } },
       "outputs": [ { "type": "file", "file": { "name": "testdata/output/reload/switch_rtc/b.pcap" } } ]
     }
   ]