diff --git a/compiler/src/dotty/tools/dotc/transform/CheckUnused.scala b/compiler/src/dotty/tools/dotc/transform/CheckUnused.scala
index bd4ef73d6eea..d420fe78107e 100644
--- a/compiler/src/dotty/tools/dotc/transform/CheckUnused.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CheckUnused.scala
@@ -624,7 +624,7 @@ object CheckUnused:
       symbol.name.mangledString.contains("$")
 
     /**
-     * Is the the constructor of synthetic package object
+     * Is the constructor of synthetic package object
      * Should be ignored as it is always imported/used in package
      * Trigger false negative on used import
      *
diff --git a/compiler/src/dotty/tools/dotc/typer/Synthesizer.scala b/compiler/src/dotty/tools/dotc/typer/Synthesizer.scala
index c623f4f9fd8a..845210a033c6 100644
--- a/compiler/src/dotty/tools/dotc/typer/Synthesizer.scala
+++ b/compiler/src/dotty/tools/dotc/typer/Synthesizer.scala
@@ -504,7 +504,7 @@ class Synthesizer(typer: Typer)(using @constructorOnly c: Context):
           else
             refineAtPrefix(childPre, childClass, childClass.primaryConstructor.info) match
               case info: PolyType =>
-                // Compute the the full child type by solving the subtype constraint
+                // Compute the full child type by solving the subtype constraint
                 // `C[X1, ..., Xn] <: P`, where
                 //
                 //   - P is the current `mirroredType`
diff --git a/compiler/src/scala/quoted/runtime/impl/QuoteMatcher.scala b/compiler/src/scala/quoted/runtime/impl/QuoteMatcher.scala
index 763f996c89e7..381f250078b3 100644
--- a/compiler/src/scala/quoted/runtime/impl/QuoteMatcher.scala
+++ b/compiler/src/scala/quoted/runtime/impl/QuoteMatcher.scala
@@ -26,7 +26,7 @@ import dotty.tools.dotc.util.optional
  *   - `isClosedUnder(x1, .., xn)('{e})` returns true if and only if all the references in `e` to names defined in the pattern are contained in the set `{x1, ... xn}`.
  *   - `lift(x1, .., xn)('{e})` returns `(y1, ..., yn) => [xi = $yi]'{e}` where `yi` is an `Expr` of the type of `xi`.
  *   - `withEnv(x1 -> y1, ..., xn -> yn)(matching)` evaluates matching recording that `xi` is equivalent to `yi`.
- *   - `matched` denotes that the the match succeeded and `matched('{e})` denotes that a match succeeded and extracts `'{e}`
+ *   - `matched` denotes that the match succeeded and `matched('{e})` denotes that a match succeeded and extracts `'{e}`
  *   - `&&&` matches if both sides match. Concatenates the extracted expressions of both sides.
  *
  *   Note: that not all quoted terms bellow are valid expressions
diff --git a/compiler/test/dotty/tools/scripting/BashExitCodeTests.scala b/compiler/test/dotty/tools/scripting/BashExitCodeTests.scala
index f5a9559dffc9..f2e64b5fad62 100644
--- a/compiler/test/dotty/tools/scripting/BashExitCodeTests.scala
+++ b/compiler/test/dotty/tools/scripting/BashExitCodeTests.scala
@@ -26,7 +26,7 @@ class BashExitCodeTests:
         s"expected $expectedExitCode but got $exitCode${pp("out", stdout)}${pp("err", stderr)}"
       }, expectedExitCode, exitCode)
 
-  // Helpers for running scala, scalac, and scalac without the the output directory ("raw")
+  // Helpers for running scala, scalac, and scalac without the output directory ("raw")
   def scala(args: String*)     = verifyExit(scalaPath, args*)
   def scalacRaw(args: String*) = verifyExit(scalacPath, args*)
   def scalac(args: String*)    = scalacRaw(("-d" +: tmpDir +: args)*)
diff --git a/staging/src/scala/quoted/staging/Compiler.scala b/staging/src/scala/quoted/staging/Compiler.scala
index 9ca994b6eb8f..98facb14b0d8 100644
--- a/staging/src/scala/quoted/staging/Compiler.scala
+++ b/staging/src/scala/quoted/staging/Compiler.scala
@@ -11,7 +11,7 @@ trait Compiler:
 
 object Compiler:
 
-  /** Create a new instance of the compiler using the the classloader of the application.
+  /** Create a new instance of the compiler using the classloader of the application.
    *
    *  Usage:
    *  ```
diff --git a/tests/neg-macros/tasty-macro-error/quoted_1.scala b/tests/neg-macros/tasty-macro-error/quoted_1.scala
index b395ec4c240b..8a4c45e46c89 100644
--- a/tests/neg-macros/tasty-macro-error/quoted_1.scala
+++ b/tests/neg-macros/tasty-macro-error/quoted_1.scala
@@ -6,7 +6,7 @@ object Macros {
 
   def impl(x: Expr[Any])(using Quotes) : Expr[Unit] = {
     import quotes.reflect.*
-    report.error("here is the the argument is " + x.asTerm.underlyingArgument.show, x.asTerm.underlyingArgument.pos)
+    report.error("here is the argument is " + x.asTerm.underlyingArgument.show, x.asTerm.underlyingArgument.pos)
     '{}
   }
 
diff --git a/tests/neg-macros/tasty-macro-positions/quoted_1.scala b/tests/neg-macros/tasty-macro-positions/quoted_1.scala
index b77373baa21c..a64e575a8d4d 100644
--- a/tests/neg-macros/tasty-macro-positions/quoted_1.scala
+++ b/tests/neg-macros/tasty-macro-positions/quoted_1.scala
@@ -7,8 +7,8 @@ object Macros {
   def impl(x: Expr[Any])(using Quotes) : Expr[Unit] = {
     import quotes.reflect.*
     val pos = x.asTerm.underlyingArgument.pos
-    report.error("here is the the argument is " + x.asTerm.underlyingArgument.show, pos)
-    report.error("here (+5) is the the argument is " + x.asTerm.underlyingArgument.show, Position(pos.sourceFile, pos.start + 5, pos.end + 5))
+    report.error("here is the argument is " + x.asTerm.underlyingArgument.show, pos)
+    report.error("here (+5) is the argument is " + x.asTerm.underlyingArgument.show, Position(pos.sourceFile, pos.start + 5, pos.end + 5))
     '{}
   }
 
diff --git a/tests/pos-with-compiler-cc/dotc/typer/Synthesizer.scala b/tests/pos-with-compiler-cc/dotc/typer/Synthesizer.scala
index 7bc9619922db..034b9c4b0044 100644
--- a/tests/pos-with-compiler-cc/dotc/typer/Synthesizer.scala
+++ b/tests/pos-with-compiler-cc/dotc/typer/Synthesizer.scala
@@ -498,7 +498,7 @@ class Synthesizer(typer: Typer)(using @constructorOnly c: Context):
           else
             refineAtPrefix(childPre, childClass, childClass.primaryConstructor.info) match
               case info: PolyType =>
-                // Compute the the full child type by solving the subtype constraint
+                // Compute the full child type by solving the subtype constraint
                 // `C[X1, ..., Xn] <: P`, where
                 //
                 //   - P is the current `mirroredType`