diff --git a/platform/util/src/com/intellij/util/EnvironmentUtil.java b/platform/util/src/com/intellij/util/EnvironmentUtil.java
index 536954029bc7..079832d33f68 100644
--- a/platform/util/src/com/intellij/util/EnvironmentUtil.java
+++ b/platform/util/src/com/intellij/util/EnvironmentUtil.java
@@ -27,6 +27,7 @@ import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.vfs.CharsetToolkit;
 import com.intellij.util.concurrency.AppExecutorUtil;
 import com.intellij.util.concurrency.FixedFuture;
+import com.intellij.util.containers.ContainerUtil;
 import com.intellij.util.io.BaseOutputReader;
 import com.intellij.util.text.CaseInsensitiveStringHashingStrategy;
 import gnu.trove.THashMap;
@@ -210,14 +211,20 @@ public class EnvironmentUtil {
       return parseEnv(lines, lineSeparator);
     }
 
+    @NotNull
     protected List<String> getShellProcessCommand() throws Exception {
       String shell = getShell();
-
       if (shell == null || !new File(shell).canExecute()) {
         throw new Exception("shell:" + shell);
       }
-
-      return new ArrayList<String>(Arrays.asList(shell, "-l", "-i"));
+      List<String> commands = ContainerUtil.newArrayList(shell);
+      if (!shell.endsWith("/tcsh")) {
+        // Act as a login shell
+        // tsch does allow to use -l with any other options
+        commands.add("-l");
+      }
+      commands.add("-i"); // enable interactive shell
+      return commands;
     }
 
     @Nullable
diff --git a/python/src/com/jetbrains/python/run/PyVirtualEnvReader.kt b/python/src/com/jetbrains/python/run/PyVirtualEnvReader.kt
index 792bcc794ab0..e0e6c1dd5f55 100644
--- a/python/src/com/jetbrains/python/run/PyVirtualEnvReader.kt
+++ b/python/src/com/jetbrains/python/run/PyVirtualEnvReader.kt
@@ -86,7 +86,7 @@ class PyVirtualEnvReader(val virtualEnvSdkPath: String) : EnvironmentUtil.ShellE
 
   }
 
-  override fun getShellProcessCommand(): MutableList<String>? {
+  override fun getShellProcessCommand(): MutableList<String> {
     val shellPath = shell
 
     if (shellPath == null || !File(shellPath).canExecute()) {