diff --git a/external-sop/src/main/java/sop/external/operation/ArmorExternal.java b/external-sop/src/main/java/sop/external/operation/ArmorExternal.java
index cb53573..4df7fca 100644
--- a/external-sop/src/main/java/sop/external/operation/ArmorExternal.java
+++ b/external-sop/src/main/java/sop/external/operation/ArmorExternal.java
@@ -10,11 +10,10 @@ import sop.exception.SOPGPException;
 import sop.external.ExternalSOP;
 import sop.operation.Armor;
 
-import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
-import java.util.Properties;
 import java.util.List;
+import java.util.Properties;
 
 /**
  * Implementation of the {@link Armor} operation using an external SOP binary.
@@ -37,7 +36,7 @@ public class ArmorExternal implements Armor {
     }
 
     @Override
-    public Ready data(InputStream data) throws SOPGPException.BadData, IOException {
+    public Ready data(InputStream data) throws SOPGPException.BadData {
         return ExternalSOP.executeTransformingOperation(Runtime.getRuntime(), commandList, envList, data);
     }
 }
diff --git a/external-sop/src/main/java/sop/external/operation/DearmorExternal.java b/external-sop/src/main/java/sop/external/operation/DearmorExternal.java
index 7fa1fdc..bedf018 100644
--- a/external-sop/src/main/java/sop/external/operation/DearmorExternal.java
+++ b/external-sop/src/main/java/sop/external/operation/DearmorExternal.java
@@ -9,7 +9,6 @@ import sop.exception.SOPGPException;
 import sop.external.ExternalSOP;
 import sop.operation.Dearmor;
 
-import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
@@ -30,7 +29,7 @@ public class DearmorExternal implements Dearmor {
     }
 
     @Override
-    public Ready data(InputStream data) throws SOPGPException.BadData, IOException {
+    public Ready data(InputStream data) throws SOPGPException.BadData {
         return ExternalSOP.executeTransformingOperation(Runtime.getRuntime(), commandList, envList, data);
     }
 }
diff --git a/external-sop/src/main/java/sop/external/operation/DetachedVerifyExternal.java b/external-sop/src/main/java/sop/external/operation/DetachedVerifyExternal.java
index b9cd182..2f19c5b 100644
--- a/external-sop/src/main/java/sop/external/operation/DetachedVerifyExternal.java
+++ b/external-sop/src/main/java/sop/external/operation/DetachedVerifyExternal.java
@@ -54,13 +54,13 @@ public class DetachedVerifyExternal implements DetachedVerify {
     }
 
     @Override
-    public DetachedVerify cert(InputStream cert) throws SOPGPException.BadData, IOException {
+    public DetachedVerify cert(InputStream cert) throws SOPGPException.BadData {
         this.certs.add(cert);
         return this;
     }
 
     @Override
-    public VerifySignatures signatures(InputStream signatures) throws SOPGPException.BadData, IOException {
+    public VerifySignatures signatures(InputStream signatures) throws SOPGPException.BadData {
         this.signatures = signatures;
         return this;
     }
diff --git a/external-sop/src/main/java/sop/external/operation/EncryptExternal.java b/external-sop/src/main/java/sop/external/operation/EncryptExternal.java
index 1a7208e..bc40208 100644
--- a/external-sop/src/main/java/sop/external/operation/EncryptExternal.java
+++ b/external-sop/src/main/java/sop/external/operation/EncryptExternal.java
@@ -93,7 +93,7 @@ public class EncryptExternal implements Encrypt {
 
     @Override
     public Ready plaintext(InputStream plaintext)
-            throws IOException, SOPGPException.KeyIsProtected {
+            throws SOPGPException.KeyIsProtected {
         return ExternalSOP.executeTransformingOperation(Runtime.getRuntime(), commandList, envList, plaintext);
     }
 }
diff --git a/external-sop/src/main/java/sop/external/operation/InlineSignExternal.java b/external-sop/src/main/java/sop/external/operation/InlineSignExternal.java
index d78dd7b..68a630d 100644
--- a/external-sop/src/main/java/sop/external/operation/InlineSignExternal.java
+++ b/external-sop/src/main/java/sop/external/operation/InlineSignExternal.java
@@ -62,7 +62,7 @@ public class InlineSignExternal implements InlineSign {
     }
 
     @Override
-    public Ready data(InputStream data) throws IOException, SOPGPException.KeyIsProtected, SOPGPException.ExpectedText {
+    public Ready data(InputStream data) throws SOPGPException.KeyIsProtected, SOPGPException.ExpectedText {
         return ExternalSOP.executeTransformingOperation(Runtime.getRuntime(), commandList, envList, data);
     }
 }
diff --git a/sop-java/src/testFixtures/java/sop/testsuite/operation/ListProfilesTest.java b/sop-java/src/testFixtures/java/sop/testsuite/operation/ListProfilesTest.java
index f566dd3..6d3c4c4 100644
--- a/sop-java/src/testFixtures/java/sop/testsuite/operation/ListProfilesTest.java
+++ b/sop-java/src/testFixtures/java/sop/testsuite/operation/ListProfilesTest.java
@@ -11,7 +11,6 @@ import sop.Profile;
 import sop.SOP;
 import sop.exception.SOPGPException;
 
-import java.io.IOException;
 import java.util.List;
 import java.util.stream.Stream;
 
@@ -26,7 +25,7 @@ public class ListProfilesTest extends AbstractSOPTest {
 
     @ParameterizedTest
     @MethodSource("provideInstances")
-    public void listGenerateKeyProfiles(SOP sop) throws IOException {
+    public void listGenerateKeyProfiles(SOP sop) {
         List<Profile> profiles = sop
                 .listProfiles()
                 .generateKey();
@@ -36,7 +35,7 @@ public class ListProfilesTest extends AbstractSOPTest {
 
     @ParameterizedTest
     @MethodSource("provideInstances")
-    public void listEncryptProfiles(SOP sop) throws IOException {
+    public void listEncryptProfiles(SOP sop) {
         List<Profile> profiles = sop
                 .listProfiles()
                 .encrypt();
@@ -46,7 +45,7 @@ public class ListProfilesTest extends AbstractSOPTest {
 
     @ParameterizedTest
     @MethodSource("provideInstances")
-    public void listUnsupportedProfiles(SOP sop) throws IOException {
+    public void listUnsupportedProfiles(SOP sop) {
         assertThrows(SOPGPException.UnsupportedProfile.class, () -> sop
                 .listProfiles()
                 .subcommand("invalid"));