diff --git a/testnet/tools/nns-tools/lib/include.sh b/testnet/tools/nns-tools/lib/include.sh
index 3ecb2f7aecc..242fdff03c4 100644
--- a/testnet/tools/nns-tools/lib/include.sh
+++ b/testnet/tools/nns-tools/lib/include.sh
@@ -24,6 +24,7 @@ source "$LIB_DIR/canisters.sh"
 source "$LIB_DIR/constants.sh"
 source "$LIB_DIR/functions.sh"
 source "$LIB_DIR/installers.sh"
+source "$LIB_DIR/nns_neurons.sh"
 source "$LIB_DIR/proposals.sh"
 source "$LIB_DIR/sns_upgrades.sh"
 source "$LIB_DIR/topology.sh"
diff --git a/testnet/tools/nns-tools/lib/nns_neurons.sh b/testnet/tools/nns-tools/lib/nns_neurons.sh
new file mode 100644
index 00000000000..f73edf268cb
--- /dev/null
+++ b/testnet/tools/nns-tools/lib/nns_neurons.sh
@@ -0,0 +1,32 @@
+##: claim_or_refresh
+## Usage: $1 <NETWORK> <NEURON_ID>
+##  Claim or refresh an NNS neuron with a particular ID
+##  NETWORK: The network to use.
+##  NEURON_ID: The neuron id to claim or refresh.
+## Example: claim_or_refresh ic 1234567890
+nns_claim_or_refresh() {
+    local network=$1
+    local neuron_id=$2
+
+    local IC=$(repo_root)
+    local GOV_DID="$IC/rs/nns/governance/canister/governance.did"
+
+    dfx canister \
+        --network ic \
+        call \
+        --candid "$GOV_DID" \
+        rrkah-fqaaa-aaaaa-aaaaq-cai \
+        manage_neuron "(
+        record {
+          id = opt record { id = ${neuron_id}: nat64 };
+          command = opt variant {
+            ClaimOrRefresh = record {
+              controller = null;
+              by = opt variant {
+                NeuronIdOrSubaccount = record { }
+              }
+            }
+          }
+        }
+      )"
+}