diff --git a/package.json b/package.json
index 36f46d7..14a87f5 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "test:integration:free": "bash test/integration/test-free-tier.sh",
     "test:integration:free:bchn": "bash test/integration/test-free-tier-bchn.sh",
     "test:integration:free:testnet": "bash test/integration/testnet/test-free-tier.sh",
-    "test:temp": "mocha --timeout 30000 -g '#validateTxid2' test/unit/slp-utils.js",
+    "test:temp": "mocha --timeout 30000 -g '#blockHeader' test/unit/electrumx.js",
     "test:integration:api": "RESTURL=https://api.fullstack.cash/v3/ mocha --timeout 30000 test/integration",
     "coverage": "nyc report --reporter=text-lcov | coveralls",
     "coverage:report": "nyc --reporter=html mocha --timeout 25000 test/unit/",
diff --git a/src/electrumx.js b/src/electrumx.js
index 0c68d15..e2b5ea8 100644
--- a/src/electrumx.js
+++ b/src/electrumx.js
@@ -441,8 +441,14 @@ class ElectrumX {
       )
       return response.data
     } catch (error) {
-      if (error.response && error.response.data) throw error.response.data
-      else throw error
+      // console.log("error: ", error)
+      if (error.response && error.response.data) {
+        if (error.response && error.response.data)
+          throw new Error(error.response.data.error)
+        else throw error.response.data
+      } else {
+        throw error
+      }
     }
   }
 
@@ -515,7 +521,7 @@ class ElectrumX {
    *     }
    *   ]
    * }
-  */
+   */
   async txData(txid) {
     try {
       // Handle single transaction.
@@ -564,7 +570,7 @@ class ElectrumX {
    *  "success": true,
    *  "txid": "..."
    * }
-  */
+   */
   async broadcast(txHex) {
     try {
       if (typeof txHex === "string") {
diff --git a/test/unit/electrumx.js b/test/unit/electrumx.js
index a203c21..479d77b 100644
--- a/test/unit/electrumx.js
+++ b/test/unit/electrumx.js
@@ -264,17 +264,38 @@ describe(`#ElectrumX`, () => {
   describe(`#blockHeader`, () => {
     it(`should throw an error for improper height input`, async () => {
       try {
+        // Mock network calls.
+        sandbox.stub(axios, "get").rejects({
+          response: {
+            data: {
+              success: false,
+              error: "height must be a positive number"
+            }
+          }
+        })
+
         const height = -10
         await bchjs.Electrumx.blockHeader(height)
+
         assert.equal(true, false, "Unexpected result!")
       } catch (err) {
         // console.log(`err: `, err)
-        assert.include(err.error, `height must be a positive number`)
+        assert.include(err.message, `height must be a positive number`)
       }
     })
 
     it(`should throw an error for improper count input`, async () => {
       try {
+        // Mock network calls.
+        sandbox.stub(axios, "get").rejects({
+          response: {
+            data: {
+              success: false,
+              error: "count must be a positive number"
+            }
+          }
+        })
+
         const height = 42
         const count = -10
 
@@ -282,7 +303,7 @@ describe(`#ElectrumX`, () => {
         assert.equal(true, false, "Unexpected result!")
       } catch (err) {
         // console.log(`err: `, err)
-        assert.include(err.error, `count must be a positive number`)
+        assert.include(err.message, `count must be a positive number`)
       }
     })
 
@@ -319,7 +340,8 @@ describe(`#ElectrumX`, () => {
       // Stub the network call.
       sandbox.stub(axios, "get").resolves({ data: mockData.details })
 
-      const txid = "4db095f34d632a4daf942142c291f1f2abb5ba2e1ccac919d85bdc2f671fb251"
+      const txid =
+        "4db095f34d632a4daf942142c291f1f2abb5ba2e1ccac919d85bdc2f671fb251"
 
       const result = await bchjs.Electrumx.txData(txid)
       // console.log(`result: ${JSON.stringify(result, null, 2)}`)
@@ -377,10 +399,7 @@ describe(`#ElectrumX`, () => {
         assert.equal(true, false, "Unexpected result!")
       } catch (err) {
         // console.log(`err: `, err)
-        assert.include(
-          err.message,
-          `Input txHex must be a string.`
-        )
+        assert.include(err.message, `Input txHex must be a string.`)
       }
     })
     it(`should broadcast a single transaction`, async () => {