diff --git a/test/functional/data/rpc_psbt.json b/test/functional/data/rpc_psbt.json
--- a/test/functional/data/rpc_psbt.json
+++ b/test/functional/data/rpc_psbt.json
@@ -76,6 +76,30 @@
             ],
             "psbt" : "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",
             "result" : "cHNidP8BAJoCAAAAAljoeiG1ba8MI76OcHBFbDNvfLqlyHV5JPVFiHuyq911AAAAAAD/////g40EJ9DsZQpoqka7CwmK6kQiwHGyyng1Kgd5WdB86h0BAAAAAP////8CcKrwCAAAAAAWABTYXCtx0AYLCcmIauuBXlCZHdoSTQDh9QUAAAAAFgAUAK6pouXw+HaliN9VRuh0LR2HAI8AAAAAAAEAIIDw+gIAAAAAF6kUD7lGNCFpa4LIM68kHHjBfdveSTSHAQMEQQAAAAEER1IhApWDvzmuCmCXR60Zmt3WNPphCFWdbFzTm0whg/GrluB/IQLath/0mhTban0CsM0fu3j8SxgxK1tOVNrk26L7/vU211KuIgYClYO/Oa4KYJdHrRma3dY0+mEIVZ1sXNObTCGD8auW4H8Q2QxqTwAAAIAAAACAAAAAgCIGAtq2H/SaFNtqfQKwzR+7ePxLGDErW05U2uTbovv+9TbXENkMak8AAACAAAAAgAEAAIAAAQAgAMLrCwAAAAAXqRT2U5MH46SNHgE20GH10f4Z4aJAiYciAgI63ZBPPW3PWd25BrDe4jUpt/+57VDl6GFRkmhgIh8Oc0cwRAIgRTR01MxwwvdCY4VG/3iyDFf07jpFdYwehUOfusVyfEQCIHUJFE9Z8ozwRybivgIdeRcpsGgorSbPeGP/ri6eS7IVQQEDBEEAAAABBEdSIQMIncEMesbbVPkTKa9hczPbOIzq0MIx9yM3nRuZAwsC3CECOt2QTz1tz1nduQaw3uI1Kbf/ue1Q5ehhUZJoYCIfDnNSriIGAjrdkE89bc9Z3bkGsN7iNSm3/7ntUOXoYVGSaGAiHw5zENkMak8AAACAAAAAgAMAAIAiBgMIncEMesbbVPkTKa9hczPbOIzq0MIx9yM3nRuZAwsC3BDZDGpPAAAAgAAAAIACAACAAQVHUiEDCJ3BDHrG21T5EymvYXMz2ziM6tDCMfcjN50bmQMLAtwhAjrdkE89bc9Z3bkGsN7iNSm3/7ntUOXoYVGSaGAiHw5zUq4AIgIDqaTDf1mW06ol26xrVwrwZQOUSSlCRgs1R1Ptnuylh3EQ2QxqTwAAAIAAAACABAAAgAAiAgJ/Y5l1fS7/VaE2rQLGhLGDi2VW5fG2s0KCqUtrUAUQlhDZDGpPAAAAgAAAAIAFAACAAA=="
+        },
+        {
+            "privkeys" : [
+                "cT7J9YpCwY3AVRFSjN6ukeEeWY6mhpbJPxRaDaP5QTdygQRxP9Au",
+                "cNBc3SWUip9PPm1GjRoLEJT6T41iNzCYtD7qro84FMnM5zEqeJsE"
+            ],
+            "psbt" : "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",
+            "result" : "cHNidP8BAJoCAAAAAljoeiG1ba8MI76OcHBFbDNvfLqlyHV5JPVFiHuyq911AAAAAAD/////g40EJ9DsZQpoqka7CwmK6kQiwHGyyng1Kgd5WdB86h0BAAAAAP////8CcKrwCAAAAAAWABTYXCtx0AYLCcmIauuBXlCZHdoSTQDh9QUAAAAAFgAUAK6pouXw+HaliN9VRuh0LR2HAI8AAAAAAAEAIIDw+gIAAAAAF6kUD7lGNCFpa4LIM68kHHjBfdveSTSHIgIC2rYf9JoU22p9ArDNH7t4/EsYMStbTlTa5Nui+/71NtdIMEUCIQD2EDizCNwdqGWjSFJ0bwFXcpNCCMbSRFQ5PNmb3yIXdwIgBW5nWmdabQoCuFsU5eKQdNiiWptXYL6igW9mGRCgBuoBAQMEQQAAAAEER1IhApWDvzmuCmCXR60Zmt3WNPphCFWdbFzTm0whg/GrluB/IQLath/0mhTban0CsM0fu3j8SxgxK1tOVNrk26L7/vU211KvIgYClYO/Oa4KYJdHrRma3dY0+mEIVZ1sXNObTCGD8auW4H8Q2QxqTwAAAIAAAACAAAAAgCIGAtq2H/SaFNtqfQKwzR+7ePxLGDErW05U2uTbovv+9TbXENkMak8AAACAAAAAgAEAAIAAAQAgAMLrCwAAAAAXqRT2U5MH46SNHgE20GH10f4Z4aJAiYciAgI63ZBPPW3PWd25BrDe4jUpt/+57VDl6GFRkmhgIh8Oc0cwRAIgZfRbpZmLWaJ//hp77QFq8fH5DVSzqo90UKpfVqJRA70CIH9yRwOtHtuWaAsoS1bU/8uI9/t1nqu+CKow8puFE4PSAQEDBEEAAAABBEdSIQMIncEMesbbVPkTKa9hczPbOIzq0MIx9yM3nRuZAwsC3CECOt2QTz1tz1nduQaw3uI1Kbf/ue1Q5ehhUZJoYCIfDnNSriIGAjrdkE89bc9Z3bkGsN7iNSm3/7ntUOXoYVGSaGAiHw5zENkMak8AAACAAAAAgAMAAIAiBgMIncEMesbbVPkTKa9hczPbOIzq0MIx9yM3nRuZAwsC3BDZDGpPAAAAgAAAAIACAACAAQVHUiEDCJ3BDHrG21T5EymvYXMz2ziM6tDCMfcjN50bmQMLAtwhAjrdkE89bc9Z3bkGsN7iNSm3/7ntUOXoYVGSaGAiHw5zUq4AIgIDqaTDf1mW06ol26xrVwrwZQOUSSlCRgs1R1Ptnuylh3EQ2QxqTwAAAIAAAACABAAAgAAiAgJ/Y5l1fS7/VaE2rQLGhLGDi2VW5fG2s0KCqUtrUAUQlhDZDGpPAAAAgAAAAIAFAACAAA=="
+        },
+        {
+            "privkeys" : [
+                "cT7J9YpCwY3AVRFSjN6ukeEeWY6mhpbJPxRaDaP5QTdygQRxP9Au",
+                "cNBc3SWUip9PPm1GjRoLEJT6T41iNzCYtD7qro84FMnM5zEqeJsE"
+            ],
+            "psbt" : "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",
+            "result" : "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"
+        },
+        {
+            "privkeys" : [
+                "cT7J9YpCwY3AVRFSjN6ukeEeWY6mhpbJPxRaDaP5QTdygQRxP9Au",
+                "cNBc3SWUip9PPm1GjRoLEJT6T41iNzCYtD7qro84FMnM5zEqeJsE"
+            ],
+            "psbt" : "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",
+            "result" : "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"
         }
     ],
     "combiner" : [
diff --git a/test/functional/rpc_psbt.py b/test/functional/rpc_psbt.py
--- a/test/functional/rpc_psbt.py
+++ b/test/functional/rpc_psbt.py
@@ -22,7 +22,7 @@
 
     def set_test_params(self):
         self.setup_clean_chain = False
-        self.num_nodes = 4
+        self.num_nodes = 3
 
     def run_test(self):
         # Create and fund a raw tx for sending 10 BTC
@@ -170,9 +170,11 @@
 
         # Signer tests
         for i, signer in enumerate(signers):
+            self.nodes[2].createwallet("wallet{}".format(i))
+            wrpc = self.nodes[2].get_wallet_rpc("wallet{}".format(i))
             for key in signer['privkeys']:
-                self.nodes[i].importprivkey(key)
-            signed_tx = self.nodes[i].walletprocesspsbt(signer['psbt'])['psbt']
+                wrpc.importprivkey(key)
+            signed_tx = wrpc.walletprocesspsbt(signer['psbt'])['psbt']
             assert_equal(signed_tx, signer['result'])
 
         # Combiner test