diff --git a/src/bitcoin-cli.cpp b/src/bitcoin-cli.cpp
index ce9e7a402..29efdfa82 100644
--- a/src/bitcoin-cli.cpp
+++ b/src/bitcoin-cli.cpp
@@ -33,7 +33,7 @@ static bool AppInitRPC(int argc, char* argv[])
         fprintf(stderr,"Error reading configuration file: %s\n", e.what());
         return false;
     }
-    // Check for -testnet or -regtest parameter (TestNet() calls are only valid after this clause)
+    // Check for -testnet or -regtest parameter (Params() calls are only valid after this clause)
     if (!SelectParamsFromCommandLine()) {
         fprintf(stderr, "Error: Invalid combination of -regtest and -testnet.\n");
         return false;
diff --git a/src/bitcoind.cpp b/src/bitcoind.cpp
index 9b535c2e6..704332c39 100644
--- a/src/bitcoind.cpp
+++ b/src/bitcoind.cpp
@@ -77,7 +77,7 @@ bool AppInit(int argc, char* argv[])
             fprintf(stderr,"Error reading configuration file: %s\n", e.what());
             return false;
         }
-        // Check for -testnet or -regtest parameter (TestNet() calls are only valid after this clause)
+        // Check for -testnet or -regtest parameter (Params() calls are only valid after this clause)
         if (!SelectParamsFromCommandLine()) {
             fprintf(stderr, "Error: Invalid combination of -regtest and -testnet.\n");
             return false;
diff --git a/src/chainparams.h b/src/chainparams.h
index 3849d33ac..653ca20f0 100644
--- a/src/chainparams.h
+++ b/src/chainparams.h
@@ -120,9 +120,4 @@ void SelectParams(CChainParams::Network network);
  */
 bool SelectParamsFromCommandLine();
 
-inline bool TestNet() {
-    // Note: it's deliberate that this returns "false" for regression test mode.
-    return Params().NetworkID() == CChainParams::TESTNET;
-}
-
 #endif