diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 1019c0de24143..9899a13a1e3bc 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -801,14 +801,14 @@ std::optional<int> GetPruneHeight(const BlockManager& blockman, const CChain& ch
     // If the chain tip is pruned, everything is pruned.
     if (!((chain_tip->nStatus & BLOCK_HAVE_MASK) == BLOCK_HAVE_MASK)) return chain_tip->nHeight;
 
-    const auto& first_unpruned{*Assert(blockman.GetFirstBlock(*chain_tip, /*status_mask=*/BLOCK_HAVE_MASK, first_block))};
+    const auto& first_unpruned{*CHECK_NONFATAL(blockman.GetFirstBlock(*chain_tip, /*status_mask=*/BLOCK_HAVE_MASK, first_block))};
     if (&first_unpruned == first_block) {
         // All blocks between first_block and chain_tip have data, so nothing is pruned.
         return std::nullopt;
     }
 
     // Block before the first unpruned block is the last pruned block.
-    return Assert(first_unpruned.pprev)->nHeight;
+    return CHECK_NONFATAL(first_unpruned.pprev)->nHeight;
 }
 
 static RPCHelpMan pruneblockchain()
diff --git a/test/lint/lint-assertions.py b/test/lint/lint-assertions.py
index d9f86b22b8f79..5d01b13fd4137 100755
--- a/test/lint/lint-assertions.py
+++ b/test/lint/lint-assertions.py
@@ -27,8 +27,9 @@ def main():
     # checks should be used over assert. See: src/util/check.h
     # src/rpc/server.cpp is excluded from this check since it's mostly meta-code.
     exit_code = git_grep([
-        "-nE",
-        r"\<(A|a)ss(ume|ert) *\(.*\);",
+        "--line-number",
+        "--extended-regexp",
+        r"\<(A|a)ss(ume|ert)\(",
         "--",
         "src/rpc/",
         "src/wallet/rpc*",
@@ -38,8 +39,9 @@ def main():
     # The `BOOST_ASSERT` macro requires to `#include boost/assert.hpp`,
     # which is an unnecessary Boost dependency.
     exit_code |= git_grep([
-        "-E",
-        r"BOOST_ASSERT *\(.*\);",
+        "--line-number",
+        "--extended-regexp",
+        r"BOOST_ASSERT\(",
         "--",
         "*.cpp",
         "*.h",