diff --git a/infra/k8s/argo/nsys-test-template.yaml b/infra/k8s/argo/nsys-test-template.yaml
index b5be4bc9b..ea2a1cb14 100644
--- a/infra/k8s/argo/nsys-test-template.yaml
+++ b/infra/k8s/argo/nsys-test-template.yaml
@@ -215,10 +215,11 @@ spec:
 
             # Honour CARGO_TARGET_DIR — outputs go to ${CARGO_TARGET_DIR}/release/deps,
             # NOT the repo-relative target/. (CI workflow sets CARGO_TARGET_DIR=/cargo-target.)
+            # Subshell + || true wraps the head -1 SIGPIPE so pipefail doesn't fire.
             TARGET_DIR="${CARGO_TARGET_DIR:-target}"
-            TEST_BIN=$(ls -t "$TARGET_DIR/release/deps/ml-"* 2>/dev/null \
+            TEST_BIN=$( (ls -t "$TARGET_DIR/release/deps/ml-"* 2>/dev/null \
               | grep -vE '\.(d|rcgu|rmeta|rlib|so|json)$' \
-              | head -1)
+              | head -1) || true )
             if [ -z "$TEST_BIN" ] || [ ! -x "$TEST_BIN" ]; then
               echo "ERROR: could not locate compiled test binary in $TARGET_DIR/release/deps/"
               ls -la "$TARGET_DIR/release/deps/" 2>&1 | head -20
diff --git a/infra/k8s/argo/sanitizer-test-template.yaml b/infra/k8s/argo/sanitizer-test-template.yaml
index 7bbf6dfcc..40b57d15b 100644
--- a/infra/k8s/argo/sanitizer-test-template.yaml
+++ b/infra/k8s/argo/sanitizer-test-template.yaml
@@ -203,10 +203,11 @@ spec:
             # Locate the freshest ml-* test binary
             # Honour CARGO_TARGET_DIR — outputs go to ${CARGO_TARGET_DIR}/release/deps,
             # NOT the repo-relative target/. (CI workflow sets CARGO_TARGET_DIR=/cargo-target.)
+            # Subshell + || true wraps the head -1 SIGPIPE so pipefail doesn't fire.
             TARGET_DIR="${CARGO_TARGET_DIR:-target}"
-            TEST_BIN=$(ls -t "$TARGET_DIR/release/deps/ml-"* 2>/dev/null \
+            TEST_BIN=$( (ls -t "$TARGET_DIR/release/deps/ml-"* 2>/dev/null \
               | grep -vE '\.(d|rcgu|rmeta|rlib|so|json)$' \
-              | head -1)
+              | head -1) || true )
             if [ -z "$TEST_BIN" ] || [ ! -x "$TEST_BIN" ]; then
               echo "ERROR: could not locate compiled test binary in $TARGET_DIR/release/deps/"
               ls -la "$TARGET_DIR/release/deps/" 2>&1 | head -20