diff --git a/internal/stage_wildcard.go b/internal/stage_wildcard.go
index ff0cd35..690cf75 100644
--- a/internal/stage_wildcard.go
+++ b/internal/stage_wildcard.go
@@ -11,21 +11,21 @@ func testWildcard(stageHarness *test_case_harness.TestCaseHarness) error {
 			Input:            "cat",
 			ExpectedExitCode: 0,
 		},
-		{
-			Pattern:          "c.t",
-			Input:            "cot",
-			ExpectedExitCode: 0,
-		},
 		{
 			Pattern:          "c.t",
 			Input:            "car",
 			ExpectedExitCode: 1,
 		},
 		{
-			Pattern:          "c.+t",
-			Input:            "coat",
+			Pattern:          "g.+gol",
+			Input:            "goøö0Ogol",
 			ExpectedExitCode: 0,
 		},
+		{
+			Pattern:          "g.+gol",
+			Input:            "gol",
+			ExpectedExitCode: 1,
+		},
 	}
 
 	return RunTestCases(testCases, stageHarness)
diff --git a/internal/test_helpers/fixtures/alternation/success b/internal/test_helpers/fixtures/alternation/success
index 83790d9..2411576 100644
--- a/internal/test_helpers/fixtures/alternation/success
+++ b/internal/test_helpers/fixtures/alternation/success
@@ -13,14 +13,13 @@
 [stage-11] $ echo -n "cat" | ./your_grep.sh -E "c.t"
 [your_program] cat
 [stage-11] ✓ Received exit code 0.
-[stage-11] $ echo -n "cot" | ./your_grep.sh -E "c.t"
-[your_program] cot
-[stage-11] ✓ Received exit code 0.
 [stage-11] $ echo -n "car" | ./your_grep.sh -E "c.t"
 [stage-11] ✓ Received exit code 1.
-[stage-11] $ echo -n "coat" | ./your_grep.sh -E "c.+t"
-[your_program] coat
+[stage-11] $ echo -n "goøö0Ogol" | ./your_grep.sh -E "g.+gol"
+[your_program] goøö0Ogol
 [stage-11] ✓ Received exit code 0.
+[stage-11] $ echo -n "gol" | ./your_grep.sh -E "g.+gol"
+[stage-11] ✓ Received exit code 1.
 [stage-11] Test passed.
 
 [stage-10] Running tests for Stage #10: ny8
diff --git a/internal/test_helpers/fixtures/backreferences_multiple/success b/internal/test_helpers/fixtures/backreferences_multiple/success
index acc46f9..a4f0129 100644
--- a/internal/test_helpers/fixtures/backreferences_multiple/success
+++ b/internal/test_helpers/fixtures/backreferences_multiple/success
@@ -95,14 +95,13 @@
 [stage-11] $ echo -n "cat" | ./your_grep.sh -E "c.t"
 [your_program] cat
 [stage-11] ✓ Received exit code 0.
-[stage-11] $ echo -n "cot" | ./your_grep.sh -E "c.t"
-[your_program] cot
-[stage-11] ✓ Received exit code 0.
 [stage-11] $ echo -n "car" | ./your_grep.sh -E "c.t"
 [stage-11] ✓ Received exit code 1.
-[stage-11] $ echo -n "coat" | ./your_grep.sh -E "c.+t"
-[your_program] coat
+[stage-11] $ echo -n "goøö0Ogol" | ./your_grep.sh -E "g.+gol"
+[your_program] goøö0Ogol
 [stage-11] ✓ Received exit code 0.
+[stage-11] $ echo -n "gol" | ./your_grep.sh -E "g.+gol"
+[stage-11] ✓ Received exit code 1.
 [stage-11] Test passed.
 
 [stage-10] Running tests for Stage #10: ny8
diff --git a/internal/test_helpers/fixtures/backreferences_nested/success b/internal/test_helpers/fixtures/backreferences_nested/success
index 17b62b0..274eab6 100644
--- a/internal/test_helpers/fixtures/backreferences_nested/success
+++ b/internal/test_helpers/fixtures/backreferences_nested/success
@@ -136,14 +136,13 @@
 [stage-11] $ echo -n "cat" | ./your_grep.sh -E "c.t"
 [your_program] cat
 [stage-11] ✓ Received exit code 0.
-[stage-11] $ echo -n "cot" | ./your_grep.sh -E "c.t"
-[your_program] cot
-[stage-11] ✓ Received exit code 0.
 [stage-11] $ echo -n "car" | ./your_grep.sh -E "c.t"
 [stage-11] ✓ Received exit code 1.
-[stage-11] $ echo -n "coat" | ./your_grep.sh -E "c.+t"
-[your_program] coat
+[stage-11] $ echo -n "goøö0Ogol" | ./your_grep.sh -E "g.+gol"
+[your_program] goøö0Ogol
 [stage-11] ✓ Received exit code 0.
+[stage-11] $ echo -n "gol" | ./your_grep.sh -E "g.+gol"
+[stage-11] ✓ Received exit code 1.
 [stage-11] Test passed.
 
 [stage-10] Running tests for Stage #10: ny8
diff --git a/internal/test_helpers/fixtures/backreferences_single/success b/internal/test_helpers/fixtures/backreferences_single/success
index e7dad93..9f15e21 100644
--- a/internal/test_helpers/fixtures/backreferences_single/success
+++ b/internal/test_helpers/fixtures/backreferences_single/success
@@ -54,14 +54,13 @@
 [stage-11] $ echo -n "cat" | ./your_grep.sh -E "c.t"
 [your_program] cat
 [stage-11] ✓ Received exit code 0.
-[stage-11] $ echo -n "cot" | ./your_grep.sh -E "c.t"
-[your_program] cot
-[stage-11] ✓ Received exit code 0.
 [stage-11] $ echo -n "car" | ./your_grep.sh -E "c.t"
 [stage-11] ✓ Received exit code 1.
-[stage-11] $ echo -n "coat" | ./your_grep.sh -E "c.+t"
-[your_program] coat
+[stage-11] $ echo -n "goøö0Ogol" | ./your_grep.sh -E "g.+gol"
+[your_program] goøö0Ogol
 [stage-11] ✓ Received exit code 0.
+[stage-11] $ echo -n "gol" | ./your_grep.sh -E "g.+gol"
+[stage-11] ✓ Received exit code 1.
 [stage-11] Test passed.
 
 [stage-10] Running tests for Stage #10: ny8
diff --git a/internal/test_helpers/fixtures/wildcard/success b/internal/test_helpers/fixtures/wildcard/success
index 8de626e..ad7f8ef 100644
--- a/internal/test_helpers/fixtures/wildcard/success
+++ b/internal/test_helpers/fixtures/wildcard/success
@@ -2,14 +2,13 @@
 [stage-11] $ echo -n "cat" | ./your_grep.sh -E "c.t"
 [your_program] cat
 [stage-11] ✓ Received exit code 0.
-[stage-11] $ echo -n "cot" | ./your_grep.sh -E "c.t"
-[your_program] cot
-[stage-11] ✓ Received exit code 0.
 [stage-11] $ echo -n "car" | ./your_grep.sh -E "c.t"
 [stage-11] ✓ Received exit code 1.
-[stage-11] $ echo -n "coat" | ./your_grep.sh -E "c.+t"
-[your_program] coat
+[stage-11] $ echo -n "goøö0Ogol" | ./your_grep.sh -E "g.+gol"
+[your_program] goøö0Ogol
 [stage-11] ✓ Received exit code 0.
+[stage-11] $ echo -n "gol" | ./your_grep.sh -E "g.+gol"
+[stage-11] ✓ Received exit code 1.
 [stage-11] Test passed.
 
 [stage-10] Running tests for Stage #10: ny8